History of paleontology in Germany

Chapter 5: The Enlightenment and the Changing Foundations of Geology and Palaeontology

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The development of systematic palaeontology described in the previous part was not an isolated scientific development. It formed part of a broader transformation in European natural philosophy that had begun with new approaches to observation and the study of nature and accelerated during the Scientific Revolution and the Enlightenment.
For centuries, explanations of the natural world had been closely connected with inherited philosophical and theological traditions. During the 16^th to 18^th centuries, however, scholars increasingly questioned established explanations and sought to understand natural phenomena through observation, mathematical reasoning, experiment, and natural processes. These changes profoundly affected ideas about the Earth, its history, and the origin and preservation of fossils.

Religious and Intellectual Framework of Early Natural History

God creates animals on stamp of Germany 2014 MiNr.: 3085, Scott: 2790.

With the spread of Christianity across Europe, the study of nature developed within a strongly religious intellectual framework.
Biblical accounts of Creation provided an important basis for understanding the natural world, while the writings of classical authors, especially Aristotle, remained influential. Medieval Christian scholars continued to study animals, plants, minerals, and unusual natural objects, combining inherited knowledge with observation and theological interpretation.
According to Christian teaching, the universe was created by God and was therefore neither eternal nor the product of chance. The Earth, the heavens, plants, animals, and humankind were understood as parts of a divinely ordered Creation, as described principally in the Book of Genesis. Life was ultimately considered to have its origin in God, with living creatures created according to the divine plan and humankind occupying a special place within Creation.

Ptolemaic hypothesis: Eccentric movements of the planets, on a stamp issued by the Sovereign Military Hospitaller Order of St John of Jerusalem of Rhodes and of Malta in 2018. The stamp reproduces an illustration from Atlas Coelestis seu Harmonia Macrocosmica by Andreas Cellarius (17th century), from the Stapleton Historical Collection, London.

Note: Stamps issued by the Sovereign Military Hospitaller Order of St John of Jerusalem of Rhodes and of Malta (SMOM) are not listed in the MICHEL and Scott catalogues, as they can be used on regular letters only for postage on a limited number of countries that have a postal agreement with the Order. Registered letters are delivered via the Italian Post and must be paid for in cash rather than with stamps.

Although Christian thinkers differed in how literally and chronologically they interpreted the biblical account, the idea of a purposeful divine Creation remained fundamental to the medieval Christian understanding of the natural world. This did not, however, mean that the study of nature was rejected. On the contrary, medieval scholars regarded the investigation of the natural world as compatible with religious belief.
By the 13^th century, Aristotle's writings had become central to scholasticism, an intellectual tradition that sought to reconcile philosophical reasoning with Christian theology. Thinkers such as Thomas Aquinas (c. 1225–1274) argued that human reason could investigate the natural world and establish certain truths, while divine revelation provided truths that exceeded the limits of reason. His synthesis of Aristotelian philosophy and Christian doctrine became highly influential in medieval discussions of nature, Creation, and the structure of the universe.

	Orbits of the planets around the Earth on a stamp issued by the Sovereign Military Hospitaller Order of St John of Jerusalem of Rhodes and of Malta in 2018. The stamp reproduces an illustration from Atlas Coelestis seu Harmonia Macrocosmica by Andreas Cellarius (17th century).
Note: Stamps issued by the Sovereign Military Hospitaller Order of St John of Jerusalem of Rhodes and of Malta (SMOM) are not listed in the MICHEL and Scott catalogues, as they can be used on regular letters only for postage on a limited number of countries that have a postal agreement with the Order. Registered letters are delivered via the Italian Post and must be paid for in cash rather than with stamps.
The 200th anniversary of the end of the inquisition in Portugal stamps of Portugal 2021 MiNr.: 4071-4072, Scott: 4300-4301.

In astronomy, the dominant model combined Aristotle's physics with the mathematical system of Ptolemy. The Earth was regarded as stationary at the centre of the universe, surrounded by concentric celestial spheres. Although this geocentric model became closely associated with medieval Christian thought, it was not simply imposed as a fixed article of faith.
University scholars continued to debate the details of cosmology, and the relationship between natural philosophy and theology was more complex than a simple opposition between “science” and the Church.

Tensions became more pronounced when new astronomical ideas appeared to conflict with established interpretations of Scripture and traditional natural philosophy. During the 16^th and 17^th centuries, the Inquisition investigated cases of suspected heresy and could intervene when scholars were accused of promoting ideas considered contrary to Catholic doctrine. Its proceedings could involve examination of writings, censorship, interrogation, trials, and, in serious cases, punishment.
These institutions were primarily concerned with religious doctrine rather than with suppressing science as such, but they could nevertheless affect scholars whose philosophical or scientific views were perceived as contradicting established teachings.
The cases of Giordano Bruno and Galileo Galilei became particularly prominent examples of the tensions that could arise between religious authority, traditional cosmology, and new approaches to understanding the natural world.
Their experiences formed part of the broader intellectual transformation associated with the Scientific Revolution of the 16^th and 17^th centuries.

The Scientific Revolution of the 16^th and 17^th Centuries

As natural philosophy developed, some scholars began to question traditional interpretations of the cosmos and their relationship to biblical accounts of Creation. This became particularly apparent during the Renaissance and the Scientific Revolution.
The Scientific Revolution of the 16^th and 17^th centuries in Europe marked an irreversible break with classical natural philosophy, fundamentally transforming how the natural world was investigated. This new approach departed from ancient Greek traditions, adopting a more mechanistic worldview that heavily integrated mathematics and focused on acquiring empirical evidence.
This intellectual shift eventually revolutionized early naturalists' understanding of the very origin of life, transitioning from theories of spontaneous generation and divine whims toward observable biological laws. Crucially, as empirical evidence of massive, unfamiliar fossil bones accumulated, it forced a profound transformation in scientific thought: the dawning realization of the concept of extinction. The revolutionary idea that entire species could vanish forever directly disrupted the traditional belief in a static, unchanging creation, laying the foundational framework for modern paleontology and the deep-time history of the Earth.

Nicolaus Copernicus (1473–1543)

A 1943 German occupation stamp from the General Government in Poland. The issue features a portrait of Nicolaus Copernicus with a surcharge overprint marking the 400th anniversary of his death.

Nicolaus Copernicus was born on 19 February 1473 in the city of Toruń (Thorn), in the province of Royal Prussia, within the Crown of the Kingdom of Poland, to German-speaking parents. His father was a merchant from Krakow and his mother, Barbara Watzenrode, came from a wealthy merchant family of ethnic German descent.

In 1543, the final year of his life, his monumental treatise De revolutionibus orbium coelestium was physically printed in Nuremberg, Germany.
Copernicus had delayed its publication for decades due to extreme perfectionism, but after his student Rheticus brought the manuscript to press, the very first bound copy finally reached the astronomer's hands on May 24, 1543 — the literal day he passed away following a paralyzing stroke.
This Copernican model proposed a revolutionary heliocentric system that directly challenged the geocentric system of Ptolemy that had prevailed for centuries with Church backing.
Instead of keeping Earth stationary at the center of the universe, Copernicus posited that the Earth is simply one of several planets revolving annually around a stationary Sun while rotating daily on its own axis.
The publication was a monumental milestone, initiating a profound shift in modern astronomy and serving as a pioneering catalyst for the broader Scientific Revolution.
While Copernicus' mathematical model decentralized the Earth, it still relied on the ancient assumption of perfect circular orbits, forcing him to use complex planetary loops (epicycles) to make his calculations work. It shook the foundation of classical cosmology, but it would take Johannes Kepler's later discovery of elliptical orbits to make the heliocentric system truly precise.
In 1616, decades after its publication, the Catholic Church officially restricted Copernicus' book "until corrected." This Counter-Reformation backlash was triggered 73 years after his death, largely in response to Galileo Galilei's aggressive advocacy for heliocentrism as a literal physical reality.

Giordano Bruno (1548–1600)

Giordano Bruno on stamp Italy 2000, MiNr.: 2715, Scott: 2329.

An Italian Dominican friar, philosopher, and mathematician, Giordano Bruno (1548–1600) expanded heliocentrism into a vast cosmological vision. He rejected the traditional Aristotelian-Ptolemaic conception of a finite universe with the Earth at its centre and instead proposed an infinite universe containing countless stars and other worlds. His cosmology was closely intertwined with his philosophical and theological ideas, rather than being based on mathematical astronomy in the modern sense.

While Bruno is chiefly remembered for his infinite cosmology, a landmark study published in 1895 by the Società dei Naturalisti in Napoli drew attention to another aspect of his natural philosophy.
In Giordano Bruno nella storia della geologia, Giuseppe De Lorenzo examined Bruno's ideas concerning the Earth's form, the relative extent of land and sea, and volcanic phenomena, presenting them as significant early contributions to the history of geological thought.

Bruno accepted the spherical form of the Earth but rejected the idea that surface irregularities compromised its shape. Traced to his own discussion in De immenso et innumerabilibus, he used the irregularities of a fruit to illustrate the relative insignificance of terrestrial relief. The 19^th-century account expressed this striking analogy by describing the highest mountains as being no higher, in proportion to the size of the Earth, than the “wrinkles on the skin of a dried apple”.

More importantly, Bruno regarded the Earth's surface as subject to long-term natural change. Giuseppe De Lorenzo highlighted Bruno's descriptions of a “slow, long-continued struggle between the emerged land and the seas”, pointing out that the distribution of oceans and continents was variable rather than permanently fixed. To support this view, Bruno's writings drew attention to marine fossil traces occurring at elevated inland positions.

Noah Ark with animals and humans on the Mini-Sheet of Israel 2007, MiNr.: , Scott: .

Consequently, his ideas challenged explanations of Earth's history based exclusively on a single catastrophic event. He questioned the traditional interpretation of the Biblical Deluge as a sufficient explanation for the geological distribution of marine remains. Rather than treating the Earth's surface as the static result of a single primordial catastrophe, he envisioned successive natural changes in the relationship between land and sea.

Bruno also turned his attention to volcanic phenomena.
In De immenso, he suggested that surface waters might actively participate in processes occurring within the Earth's hot interior. This represents an early attempt to explain thermal and volcanic mechanics through natural, physical interactions rather than through supernatural causes.

These observations did not constitute a geological theory in the modern sense, and it would be misleading to describe Bruno as a founder of geology or as a fully developed uniformitarian thinker. Readily standing out for their willingness to regard the Earth as a dynamic natural body, his writings showed that its appearance could be understood through processes operating over long periods of time. His ideas therefore form an important early stage in the gradual transition from traditional theological frameworks towards naturalistic interpretations of Earth's history.

Captured by the Roman Inquisition, Bruno spent approximately seven years in prison, refusing to recant his philosophical and theological positions. Upon hearing his death sentence, he is traditionally reported to have told his judges: “Perhaps you pronounce this sentence against me with greater fear than I receive it”.
On 17 February 1600, he was burned at the stake for heresy in Rome's Campo de' Fiori.

Giordano Bruno on stamp Bulgaria 1998, MiNr.: 4363, Scott: 4058.

Although Bruno's cosmological views contributed to the controversy surrounding him, his condemnation was based on a much broader range of theological and philosophical doctrines. Among the propositions attributed to him were positions concerning the Trinity, the divinity of Christ, and other fundamental Christian doctrines. His execution should therefore not be presented simply as punishment for supporting heliocentrism or for his ideas about the structure of the universe.

Today, a bronze monument erected in 1889 stands at the site of Bruno's execution in the Campo de' Fiori. The monument has subsequently become associated with the history of freedom of philosophical and scientific thought, although Bruno's own intellectual position combined cosmology, natural philosophy, metaphysics, and theology in ways that do not correspond neatly to the modern distinction between science and religion.

Galileo Galilei (1564–1642)

Two of the four Italian stamps from 1942 commemorating the 300th anniversary of Galileo's death. The purple stamp (50 Centesimi) shows a reflective close-up portrait of an elderly Galileo. The green stamp (25 Centesimi) shows Galileo demonstrating his newly constructed telescope to the Venetian Senate in 1609. MiNr.: , Scott: .

An Italian physicist and astronomer who transformed the heliocentric debate from an abstract mathematical exercise into an undeniable physical reality. By constructing his own improved telescopes, Galileo discovered the moons of Jupiter (proving not all celestial bodies orbit Earth) and tracked the phases of Venus (proving it orbits the Sun). His public advocacy for heliocentrism, particularly in his 1632 Dialogue Concerning the Two Chief World Systems, provoked fierce opposition from the Roman Inquisition.
Tried for heresy in 1633, a frail Galileo was forced to recant on his knees his life's work. He spent his remaining nine years under strict house arrest, where he smuggled out his final masterpiece on kinematics.

Beyond his astronomical triumphs, Galileo played a quiet role in the birth of empirical fossil study. As an early member of the prestigious Accademia dei Lincei in Rome, he utilized his telescope lenses as primitive microscopes to assist fellow naturalists in examining the fine organic structures of petrified wood and fossilized shark teeth. This collaborative work led to some of the earliest scientifically illustrated catalogs of European fossils, bridging the gap between the Scientific Revolution and the dawn of geology.
In 1611, Galileo Galilei joined the Academy as its sixth member. His expertise in optics and his experimental approach to observation strongly influenced the Lincean programme of studying nature through instruments as well as direct observation. In 1624, Galileo developed an early compound microscope, which he called an occhiolino, for observing very small objects.

Galileo Galilei with occhiolino on stamp of Italy 1983 MiNr.: 1842, Scott: 1558.

The Lincean physician Giovanni Faber subsequently coined the term “microscope” for the instrument. Galileo used it to examine insects and other small organisms, revealing anatomical details that could not be seen with the naked eye.
The new optical techniques stimulated a close collaboration between scientists and artists. The Academy promoted highly detailed illustrations of plants, fungi, insects, fossils, and other natural objects, including the famous Melissographia of 1625, which depicted the anatomy of a bee under magnification. These developments formed part of the Lincean commitment to precise observation, visual documentation, and empirical study of the natural world.
The Academy supported Galilei's scientific work and helped publish his research. Several of Galileo publications were sponsored by the Lincei and bear their symbol The Academy was also standing behind him during his disputes with the Roman Inquisition.

Johannes Kepler (1571–1630)

Johannes Kepler on stamp of German Democratic Republic 1971, MiNr.: 1649, Scott: 1275.

Johannes Kepler on overprinted provisional stamp of Benin (1985), MiNr.: 407, Scott: C342.

A German astronomer and mathematician who provided the ultimate mathematical breakthrough for the heliocentric theory of Copernicus. Utilizing the highly precise planetary observations collected by his mentor Tycho Brahe, Kepler realized that Copernicus's original model was mathematically flawed because it relied on perfect circles. Kepler solved these geometric anomalies by formulating his Three Laws of Planetary Motion, proving that planets actually travel in elliptical orbits with the Sun at one focus.
His work bridged the theoretical gap between Copernicus and Galileo , providing the structural, predictive proof required to permanently dismantle the ancient Ptolemaic and Aristotelian systems.

Unlike Galileo, Kepler’s primary religious persecution came from his own faith. A devout Lutheran, his independent theological beliefs regarding the Eucharist led to his formal excommunication by the Lutheran Church in 1612, barring him from Communion and academic positions at Tübingen.
Concurrently, his refusal to convert to Catholicism forced him into exile from Graz in Austria. His personal life was further upended in 1615 when his elderly mother, Katharina, was accused of witchcraft by paranoid Protestant authorities. Kepler paused his planetary calculations for nearly six years to serve as her legal defense lawyer, successfully utilizing his status as Imperial Mathematician to secure her acquittal from the stake in 1621.

The Catholic Church and the Acceptance of Heliocentrism

While these ideas originally caused deep theological rifts, the Catholic Church has gradually reassessed its relationship with modern astronomy.
This shift became particularly visible in 1992, when Pope John Paul II acknowledged that errors of judgment had been made in the handling of Galileo's case and that the conflict between scientific investigation and religious faith need not be inevitable.

Galileo Galilei on stamp (MiNr.: 1123, Scott: 954) and commemorative postmark of vatican 1994.

The changing attitude toward astronomy has also been reflected in Vatican philately. On May 31^st, 1994, Vatican City issued a stamp set as part of the Europa 1994 theme, "Europe and the Discoveries". One of these stamps depicts Galileo Galilei at the centre of a system of orbital rings, surrounded by stars and scientific instruments, symbolizing the progress of astronomical research.

Nicolaus Copernicus was also commemorated on Vatican postage issues, first in 1973, when the Postal and Philatelic Office of Vatican City marked the 500^th anniversary of his birth, and again in 2023, when Vatican City issued a joint commemorative Souvenir-Sheet with Poland to mark the 550^th anniversary of his birth.
Thus, Copernicus and Galileo have both become subjects of Vatican philatelic issues, reflecting the eventual acceptance of the heliocentric revolution within the Catholic Church's historical understanding of science.

Nicolaus Copernicus on the joint issue of Vatican City (MiNr.: 2043, Scott: 1818) and Poland (MiNr.: Bl. 272, Scott: 4625) issued in 2023 to celebrate his 550th anniversary. The design reproduces Astronomer Copernicus, or Conversations with God, painted by the Polish artist Jan Matejko and completed in 1873, from the collection of the Jagiellonian University in Krakow.

The Vatican's treatment of Giordano Bruno was very different. Bruno, a former Dominican friar, was tried by the Roman Inquisition and executed in Rome in 1600 for heresy. Although his philosophical and theological doctrines have not been rehabilitated, the Vatican expressed profound regret in 2000 over the coercive procedures and violent outcome of his trial and execution. Bruno has never been commemorated on a Vatican postage stamp.
Johannes Kepler, in contrast, was not subjected to comparable action by the Catholic Church. As a Lutheran, he worked largely in the Protestant world and became an important successor to Copernicus, providing a mathematical foundation for the heliocentric model through his laws of planetary motion. The Vatican Observatory recognizes him as a major figure in modern astronomy. No postage stamp dedicated to Kepler has been issued by Vatican City.

he Enlightenment and the Changing Foundations of Geology and Palaeontology

The tension between scientific inquiry and religious authority continued into the eighteenth century, although ecclesiastical control over scientific debate gradually weakened as natural philosophy became increasingly independent of theology and empirical methods gained importance.

Comte de Buffon and the Physical History of the Earth

Georges-Louis Leclerc, Comte de Buffon on FDC of France 1949

Personalized Mini-Sheet issued in 2016 by the French Federation of Philatelic Associations (FFAP) for the stamp show "La passion du timbre : Paris-Philex" and the 89th Congress of the FFAP. The statue of Buffon located in the botanical garden of the Natural History Museum at Paris deoicted in the bottom-right corner.

An important example of this tension was Georges-Louis Leclerc, Comte de Buffon (1707–1788). In his monumental Histoire naturelle, published from 1749 onward, Buffon included a "Theory of the Earth" where he brilliantly discussed many foundational points in geology, proposing a physical history of the planet that was completely incompatible with traditional biblical chronology. Soon after publication, in 1751, he received an official letter from the Faculty of Theology at the Sorbonne in Paris, stating that fourteen of his propositions were reprehensible and contrary to the creed of the Church.

The primary objection targeted his secular mechanism for landscape formation, specifically his claim that: "The waters of the sea have produced the mountains and valleys of the land; the waters of the heavens, reducing all to a level, will at last deliver the whole land over to the sea; and the sea, successively prevailing over the land, will leave dry new continents like those we inhabit".
Politely requested by the college to recant, and having no desire to be a martyr to science, Buffon formally qualified his views by publishing a mandatory declaration in his next volume: "I declare that I had no intention to contradict the text of Scripture; that I believe most firmly all therein related about the creation, both as to order of time and matter of fact; and I abandon everything in my book respecting the formation of the earth, and, generally, all which may be contrary to the narration of Moses".

Nevertheless, this submission was merely a tactical retreat. In 1778, Buffon published Les Époques de la Nature, where he bypassed traditional constraints entirely to present a sequence of distinct geological epochs, boldly estimating the Earth's age at approximately 75,000 years. His brilliant synthesis ultimately survived institutional pushback, helping to permanently establish the deep antiquity and physical history of the Earth as legitimate subjects for independent scientific investigation.

Changing Relations Between Religious and State Authority

The French Revolution of 1789 marked an important political turning point in the relationship between religious authority and the state. The Revolution challenged the political privileges of the Catholic Church and placed the clergy under state control. Although the relationship between Church and state was subsequently modified under Napoleon, the Revolution initiated a longer process of reducing ecclesiastical influence over public and intellectual life. In France, this process culminated in the formal separation of Church and state in 1905. Other European countries followed different paths.

Otto von Bismarck on stamp of Germany 2015, MiNr.: 3145, Scott: 2838.

In Germany, the process was more gradual and did not result in a complete separation comparable to the French model. The Kulturkampf of the 1870s marked an important attempt by the German state, particularly under Otto von Bismarck, to strengthen state authority over the Catholic Church, including its influence on education. Although many of the measures were later abandoned, the conflict reflected the growing independence of the modern state from ecclesiastical authority. The Weimar Constitution of 1919 subsequently established that there was no state church and guaranteed the autonomy of religious communities, while retaining certain institutional relationships between religious bodies and the state.

This broader transformation affected the development of the natural sciences. During the nineteenth century, universities, museums, scientific societies, and professional scientific communities increasingly developed their own institutional structures and methods. Questions concerning the age of the Earth, geological change, the history of life, and eventually the evolution of species could increasingly be investigated through observation, experimentation, and geological evidence rather than being required to conform to traditional biblical chronology.

Conclusion

The Enlightenment therefore provided more than a new intellectual climate for the study of nature. It helped establish principles of observation, comparison, experiment, and critical examination that increasingly shaped the study of the Earth and its fossil remains. Religious explanations did not simply disappear, nor did science develop independently of religious thought; rather, the relationship between natural philosophy, theology, and empirical investigation gradually changed.
In the German-speaking lands, these intellectual changes coincided with the expansion of mining, mineralogy, geology, universities, scientific societies, and natural-history collections. The study of fossils was consequently becoming increasingly connected with specialized institutions and professional scientific training. This development would lead, during the late 18^th and 19^th centuries, to the institutionalization of geology and palaeontology as distinct scientific disciplines.

References

Church control of science

Geocentrism Wikipedia academic.oup.com University Today The Max Planck Research Library

Ptolemy Wikipedia Stanford

Thomas Aquinas Wikipedia

Inquisition Wikipedia

The Scientific Revolution of the 16^th and 17^th centuries in Europe

Nicolaus Copernicus Wikipedia Encyclopaedia Britannica Copernican heliocentrism Wikipedia Encyclopaedia Britannica

Giordano Bruno Wikipedia Encyclopaedia Britannica

Galileo Galilei Wikipedia Encyclopaedia Britannica Accademia dei Lincei Wikipedia Encyclopaedia Britannica

Johannes Kepler Wikipedia Encyclopaedia Britannica

The Enlightenment and the Institutionalization of Geology and Paleontology

Comte de Buffon Wikipedia Encyclopaedia Britannica

Separation of religious authority from the state