De vita et moribus philosophorum

De vita et moribus philosophorum ('Lives and Manners of the Philosophers') is an anonymous Latin biographical dictionary compiled in northern Italy in the early fourteenth century, probably between 1317 and 1320. It presents accounts of 132 figures from Greek and Roman antiquity, ranging from Thales of Miletus in the sixth century BC to Priscian in the sixth century AD, and includes philosophers alongside poets, historians, physicians, grammarians, and statesmen.

The text circulated widely in manuscript and print. There are over 270 manuscript copies of De vita et moribus philosophorum, mostly from France and Italy. It was a popular early printed book, going through 30 editions by 1530. It was translated into Spanish in the early fifteenth century and into Italian by 1475. Two German translations had been made by 1490, and three in Polish by the early sixteenth century. It was also translated into Catalan, French and Czech.

Although it was attributed from the fifteenth century onward to the English philosopher Walter Burley, modern scholarship has rejected this attribution and treats the work as anonymous. The unidentified Italian compiler is conventionally referred to as Pseudo-Walter Burley.