Update:

Winter Recess: Harvard Library and the University are closed from noon on Wednesday, December 24, 2025 through Thursday, January 1, 2026. Check library hours and view our services schedule.

Prester John was a famous Christian monarch invented by European crusaders in the early 12th century. The story of Prester John as ruler of a fabled Christian land overflowing with gold somewhere in Africa or Asia inspired countless exploratory missions aimed at expanding European and Christian authority across the globe. Learn more in this online exhibit from the Harvard Map Collection.

View the Exhibit