The Book of Routes and Realms (Kitāb al-Masālik wa al-Mamālik), authored by Ibrāhīm al-Iṣṭakhrī in the 10th century, is a pivotal geographical text detailing the Islamic world, divided into twenty regions. Iṣṭakhrī, a notable geographer from Istakhr, significantly influenced Islamic geography. The manuscript, housed at the National Museum of Iran, is among the oldest from the Seljuk period and features a Persian translation. It includes artistic elements like gilded headpieces and colored maps, and is recognized by UNESCO for its cultural importance. The work provides insights into distances, products, and historical monuments, especially focusing on Persia.