Bibliothèque des Écoles françaises d'Athènes et de Rome ("Library of the French schools of Greece and Rome") is the name of two published series of historical documents, such as the letters of 13th century Popes during the Crusades. Modern history books which cite excerpts from letters of the Crusades, often list the BEF[1] in their citation.[2] The first series began publication in 1877.[3] The second series was published 1884–1960.[4]