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Ancient authors explored a vast array of disciplines, including history, astronomy, philosophy, mathematics, geography, and languages. Many argue that the lost books of antiquity represent gaps in our understanding of the past. Yet, considering their sheer volume, it’s more fitting to view the surviving texts—mere fragments of what once existed—as small islands of knowledge in an ocean of the unknown.
10. Ctesias’s Persica
Ctesias, a Greek physician and historian, served at the Persian court under kings Darius II and Artaxerxes II from 405–398 BC. Upon returning to Greece in the early fourth century BC, he authored Persica, a 23-volume history of the Middle East. This work began with the legendary Assyrian king Ninus and concluded with events from the eighth year of Artaxerxes II’s reign (398–397 BC).
The first three books of Persica covered Assyrian history, while books 4 to 6 focused on the Medes. Books 7 to 13 detailed the rise of the Persian empire under Cyrus the Great (559–530 BC), its peak under Darius, and concluded with Xerxes I’s death. The final books recounted the first eight years of Artaxerxes II’s rule, a period Ctesias personally witnessed.
Although the original work has been lost, fragments and commentaries from other authors, such as the Roman writer Diodorus, have preserved its legacy.
9. Aristarchus’s Astronomical Treatise
Aristarchus of Samos, an ancient Greek mathematician and astronomer, was centuries ahead of his time with his revolutionary Sun-centered planetary model. He documented this groundbreaking theory in a book that has since been lost. A copy of this work was once housed in the renowned Library of Alexandria. Archimedes, in his text The Sand Reckoner, outlines Aristarchus’s central argument:
“[ . . . ]but Aristarchus of Samos presented a book containing specific hypotheses, leading to the conclusion that the universe is vastly larger than currently believed. His hypotheses state that the fixed stars and the Sun remain stationary, while the Earth orbits the Sun along a circular path, with the Sun at the center of this orbit.”
8. Berossus’s Babyloniaca
Berossus, a Babylonian priest active in the third century BC, authored a three-volume history of Babylon, drawing from Babylonian historical archives. The first book detailed the land of Babylon and its origins, while the second chronicled its history from the mythical figure Oannes, said to have lived 432,000 years before the flood, up to King Nabonassar. The third book explored Babylon’s political history until the era of Alexander the Great. Berossus aimed to provide an unbiased account of Babylonian history, countering the inaccuracies and cultural biases found in Greek writings.
Berossus presented his Babyloniaca to Antiochus I, a Hellenistic king, who received a copy. Unfortunately, all original versions of his work have vanished, and only fragmented excerpts survive in the works of later authors.
7. Eratosthenes’s On The Measurement Of The Earth
Eratosthenes (276–195 BC), a distinguished Greek scholar from Alexandria, excelled in mathematics and geography. He authored a significant work titled On the Measurement of the Earth, in which he calculated the Earth’s circumference using the distances between various locations and the angles of shadows.
In his treatise, Eratosthenes determined the Earth’s circumference to be 250,000 stadia, approximately 40,000 kilometers. While this figure is about 15 percent larger than modern measurements, it remained the most precise estimate until advanced scientific methods were introduced.
6. Pythagorean Books
While it is commonly believed that Pythagoras left no written works, some ancient sources suggest otherwise, claiming that his writings were lost over time.
Pliny, in his Natural History, recounts that in the early second century, books associated with the Pythagorean school were discovered inside the tomb of King Numa. The Romans, who lacked a strong philosophical inclination, destroyed these texts. Although there was a belief that King Numa had been a student of Pythagoras, this would have been chronologically implausible.
5. China’s First Emperor And The Burning Of The Books
In 213 BC, Qin Shi Huang, China’s first emperor, commanded the destruction of all historical texts and records, sparing only official documents. Citizens were required to surrender privately owned philosophical works to authorities for burning. This act aimed to suppress dissent and criticism of his rule. Some historians suggest that Qin Shi Huang sought to erase history and establish his reign as the starting point of a new era.
Many experts argue that this event was exaggerated by Han dynasty writers, who harbored a strong bias against Qin Shi Huang. Among the lost works was the Classic of Music, attributed to Confucius or his early disciples.
4. Charvaka Texts
The Charvaka school, an ancient Indian philosophical movement dating back to the seventh century BC, challenges the perception of India as a purely spiritual land. This materialistic school rejected traditional religious beliefs, asserting that everything is composed of earth, air, fire, and water. They argued that only what is perceivable by the senses exists, dismissing heaven and hell as human constructs. According to Charvaka, religious practices were primarily designed to benefit priests economically.
Almost all Charvaka texts have been lost, and their ideas are reconstructed from fragments and references in later writings. Below is a poetic excerpt attributed to a Charvaka member, possibly from the Barhaspatya sutras, criticizing the priestly class:
The costly rites enjoined for those who die Are but a means of livelihood devised By sacerdotal cunning, nothing more . . . . While life endures let life be spent in ease And merriment; let a man borrow money From all his friends, and feast on melted butter
3. The Yongle Encyclopedia
Emperor Yongle of China commissioned an extensive encyclopedia, a project that engaged thousands of scholars over several years. Completed in 1408, this encyclopedia encompassed all essential knowledge of Chinese thought and literature. The final work consisted of 22,937 manuscript rolls, organized into 11,095 volumes.
Due to its immense size, each copy of the encyclopedia was prohibitively expensive, and only three copies are known to have circulated. Today, fewer than 400 volumes survive, with around 800 rolls published, representing less than 4 percent of the original work.
2. Origen’s Hexapla
Origen, a second-century Greek scholar, created the Hexapla, a monumental edition of the Hebrew Bible. This work featured six parallel columns, each presenting a different version of the text, enabling scholars to compare translations side by side.
Origen spent approximately 20 years compiling the Hexapla, which spanned around 7,000 pages. It became a vital resource for early biblical scholars, offering a meticulous word-for-word comparison of various versions, along with Origen’s annotations and critical analysis. Today, only fragments of this colossal work remain. An edition of these fragments was published in 1875, and scholars from various universities are now working on a new edition, incorporating additional fragments discovered since then.
1. Claudius’s Etruscan-Latin Dictionary
Long before the Romans emerged as a dominant force, the Etruscans thrived in northern Italy. While their writing system was derived from the Greek alphabet, the Etruscan language remains a mystery. Its linguistic origins are still debated, with some suggesting it is a pre-Indo-European language. Although we can pronounce Etruscan words, their meanings remain largely unknown.
The key to unlocking the Etruscan enigma lies in a lost work by Roman emperor Claudius (10 BC–AD 54). By the first century BC, the Etruscan language had nearly vanished. Claudius authored a 20-volume study on the Etruscans, including an Etruscan-Latin dictionary based on conversations with the last native speakers of the language.
