Bartholomaeus Anglicus (before 1203–1272), also known as Bartholomew the Englishman and Berthelet, was an early 13th-century Scholastic of Paris, a member of the Franciscan order. He was the author of the compendium De proprietatibus rerum ("On the Properties of Things"), dated c.1240, an early forerunner of the encyclopedia and a widely cited book in the Middle Ages. Bartholomew also held senior positions within the church and was appointed Bishop of Łuków in what is now Poland, although he was not consecrated to that position. Source: Wikipedia (en)