"Categoriae" from Aristoteles. Aristotle (384-322 BCE) was a Greek philosopher born in Greece, in 384 BCE.

"De interpretatione" from Aristoteles. Aristotle (384-322 BCE) was a Greek philosopher born in Greece.

"De cathechizandis rudibus" from Aurelius Augustinus. Augustine of Hippo (354-430), also known as Saint Augustine or Saint Austin, was an early Christian theologian whose writings were very influential in the development of Western Christianity and Western philosophy.

"De correptione et gratia" from Aurelius Augustinus. Augustine of Hippo (354-430), also known as Saint Augustine or Saint Austin, was an early Christian theologian whose writings were very influential in the development of Western Christianity and Western philosophy.

"De magistro" from Aurelius Augustinus. Augustine of Hippo (354-430), also known as Saint Augustine or Saint Austin, was an early Christian theologian whose writings were very influential in the development of Western Christianity and Western philosophy.

"De diuisione" from Boethius. Anicius Manlius Severinus Boethius, commonly called Boethius (480-525), was a philosopher of the early 6th century."

"Introductio ad syllogismos categoricos" from Boethius. Anicius Manlius Severinus Boethius, commonly called Boethius (480-525), was a philosopher of the early 6th century."