The Islamic Geographers: Mapping the World Before Europe Did
Muslim geographers and travellers mapped, described, and measured the Earth with a precision that Europe would not match for centuries. Al-Biruni calculated the Earth's radius with extraordinary accuracy in the 11th century. Al-Idrisi produced the most accurate world map of the medieval period. Ibn Battuta travelled further than any person in pre-modern history.
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Al-Biruni: The Most Original Scientist of the Medieval Period
Abu Rayhan Muhammad ibn Ahmad al-Biruni (973–1048 CE) was a Persian polymath described by George Sarton as "the most original scientist of the whole medieval period." His contributions span mathematics, astronomy, physics, geography, pharmacology, and comparative religion.
Earth's radius: Al-Biruni developed a new method for calculating the Earth's radius using a measurement of the height of a mountain at Nandana (in present-day Pakistan) and the angle to the horizon. His result (approximately 6,340 km) is within 1% of the modern measurement of 6,371 km. This was the most accurate measurement of the Earth's radius in the pre-modern period.
Comparative religion: His Kitab al-Hind (Book of India) is the most comprehensive study of Indian civilisation produced in the medieval period: covering religion, philosophy, mathematics, science, and culture. It pioneered the methodology of comparative religion and anthropological study.
Pharmacology: His Kitab al-Saydana (Book of Pharmacy) was the most comprehensive medieval pharmacological work, describing hundreds of drugs from across the known world.
Al-Idrisi: The Best Map of the Medieval World
Muhammad al-Idrisi (1100–1166 CE) was a Moroccan geographer who worked at the court of the Norman King Roger II of Sicily. His Tabula Rogeriana (Book of Roger, 1154 CE) was the most accurate and comprehensive world map of the medieval period: incorporating knowledge from Islamic, Greek, and other sources. It depicted the known world from China to Scandinavia with a precision that European cartography would not equal for another century.
Al-Idrisi's maps were used by European navigators for centuries. His work influenced the Portuguese and Spanish exploration that produced the Age of Discovery.
Al-Masudi: The Herodotus of the Arabs
Abu al-Hasan Ali ibn al-Husain al-Masudi (896–956 CE) was an Arab historian, geographer, and traveller whose Muruj al-Dhahab (Meadows of Gold) combined historical narrative, geographical description, and anthropological observation across the known world. He is called the Herodotus of the Arabs.
He described cultures, religions, customs, and geographies from China to sub-Saharan Africa, information that was centuries ahead of European knowledge of the same regions.
Ibn Battuta: The Greatest Traveller in Pre-Modern History
Abu Abdallah Muhammad ibn Battuta (1304–1368 CE) was a Moroccan scholar and traveller who covered approximately 117,000 km across his lifetime of travel, more than any other person in pre-modern history, surpassing even Marco Polo. His journeys took him to North Africa, East Africa, the Middle East, Central Asia, South Asia, Southeast Asia, China, and the West African kingdoms of Mali and Timbuktu.
His Rihla (Travels) is the most comprehensive account of the 14th-century world in any language. It documents societies, rulers, scholars, trade networks, and religious practices across every continent that was then known to the Islamic world.
Ibn Battuta travelled as a Muslim scholar and was received with hospitality across the Islamic world, evidence of the unity and reach of Islamic civilisation at its height.
Common Misconceptions
"Europeans discovered the world through exploration." Muslim geographers had mapped, described, and measured most of the known world before European exploration began. The Age of Discovery built on geographical knowledge that had been produced in Arabic centuries earlier.
Scholar References
- Al-Biruni, Kitab al-Hind and Kitab al-Saydana
- Al-Idrisi, Tabula Rogeriana (1154 CE)
- Ibn Battuta, Rihla (14th century)
- George Sarton: on al-Biruni as the most original scientist of the medieval period
- Science in the Medieval Islamic World: Wikipedia