The Pantheon is a magnificent ancient temple in Rome that was later converted into the church of Santa Maria ad Martyres. Dating from 125 AD, this is the most complete ancient building in Rome and one of the city's most spectacular sights.

Until the 20th century, the Pantheon was the largest concrete structure in the world. Michelangelo studied its great dome before starting work on the dome of St. Peter's Basilica.

The Pantheon was dedicated to pan theos, "all the gods." When it became a church, it was dedicated to the Virgin Mary and all the martyrs.

The Pantheon is the burial place of several important Italians (including the artist Raphael), and it remains an active church. It is a major tourist destination and a popular place for weddings.