This is the online version of the well-known Catholic Encyclopedia. Though somewhat dated, the article still gives a very clear, accessible introduction to Galatians. It is also heavily hypertexted, allowing the reader to explore other issues elsewhere in the encyclopedia.
This article by Dr. Greg Herrick is a detailed analysis of the issue of the location of the Galatian churches. It also relates this issue to attempts to use Galatians to form a chronology of Paul's life.
This is the online version of the well-known Catholic Encyclopedia. Though somewhat dated, the article still gives a very clear, accessible introduction to Romans. It is also heavily hypertexted, allowing the reader to explore other issues elsewhere in the encyclopedia.