Book written in the sixth century addresses topics such as geography, cosmography, and scriptural exegesis. Read the text in English or Greek.

Alain of Lille wrote this long treatise about nature in 1202. See a complete translation made in 1908 by Douglas M. Moffat.

See the conclusions of Marsilius' treatise on the state, which found that power to rule came from the people and defined the term "legislator."