The Epistle to the Ephesians, also called the Letter to the Ephesians or simply Ephesians, is traditionally ascribed to Paul the Apostle.  According to tradition, Paul wrote the letter while in prison in Rome in 62 AD, around the same time he wrote Colossians and Philemon.  Because of this, the book is sometimes grouped with Philippians, Colossians, and Philemon to form the Prison Epistles.