Barthélémy l’Anglais, or Bartholomeus Anglicus, was a Franciscan monk who lived between 1203-1272 CE. He is known for his encyclopedia Livres des Propriétés Choses, or On the Nature of Things.
This encyclopedia explores the sciences understood during l’Anglais’ life, including theology, philosophy, medicine, chronology, zoology, botany, geography, astronomy, and mineralogy.
Both Jewish and Arab sources were used in compiling the encyclopedia, as were ancient Greek materials, which was unusual for this time period. The encyclopedia was translated into Spanish, French, Dutch, and English.