Internet History Sourcebooks Project
Fordham University: Medieval Sourcebook: Laws of Constantine
This site, which is provided for by the Medieval Sourcebook of Fordham University, gives the text of five of the laws passed by Constantine regarding Catholics and the Christian Church.
Other
The Latter Rain: Constantine
This extensive resource documents the life of Constantine. Article is written from a Christian perspective. It goes into depth about the freedom he gave to Christians, and the effects of the Edict of Milan.