During classical antiquity it this temple was dedicated to all the gods of pagan Rome, Marco Vispanio Agrippa, Augusto's, favourit son, built it between 27 abd 25 BC in low, to celebratehis victoryagainst the persians. The original rectangular shape wasmodified after two when Adriano rebuilt it in a circular shape in AD 125. That is why was it then became known as the "Rotonda". In 608 became a Christian church and was dedicated to "Santa Maria ad Martyres", to all the saints in substituitionfor the ancient pagan gods.According to a legend the opening on the dome was made by a vicious demon, who, during consecration ceremony of the church wanted to escape and managed to demolish this part of the roof with butts oh his homes.