The Remaining Signs of Past Centuries

The Remaining Signs of Past Centuries (Arabic: کتاب الآثار الباقية عن القرون الخالية ‎‎ Kitāb al-āthār al-bāqiyah `an al-qurūn al-khāliyah, also known as Chronology of Ancient Nations or Vestiges of the Past, after the translation published by Eduard Sachau in 1879) by Abū Rayhān al-Bīrūnī, is a comparative study of calendars of different cultures and civilizations, interlaced with mathematical, astronomical, and historical information, exploring the customs and religions of different peoples.

Completed in 1000 AD (AH 390/1), it is Al-Biruni's first major work, compiled in Gorgan, at the court of Qabus, when he was in his late twenties.

The text survives in an early 14th-century Ilkhanid manuscript by Ibn al-Kutbi (the "Edinburgh codex", AH 707 / AD 1307–8, 179 folios, Northwestern Iran or northern Iraq, kept at the Edinburgh University Library, MS Arab 161). The manuscript contains 25 paintings and survives also in an exact 17th-century Ottoman copy (MS Arabe 1489, kept in the Bibliothèque nationale de France).

Hillenbrand (2000) interprets the choice and placement of illustrations throughout the text as a cycle which emphasizes the interest of the Ilkhanids in religions other than the predominant Islam, many illustrations showing specific episodes related to Manichaeism, Buddhism, Judaism, and Christianity. Other illustrations show a keen interest in topics of history and science. The account of the birth of Julius Caesar is illustrated with a realistic rendition of a cesarean section.

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