The Church of Sant' Angelo is a paleo-Christian temple in the city. The circular building dates to the 5th to 6th century, and incorporates corinthian capped columns from a prior pagan temple. The church is also known as the Temple of San Michele Arcangelo, since it is dedicated to the Archangel Michael, whose churches were often located in elevated spots. The small round church is also often called a Tempietto, and is located in the neighborhood, Borgo Sant'Angelo near the ancient northern gate (Porta Sant'Angelo) of the city. The structure of the church has been altered across the centuries; in 1479, it was converted into a small fort.