Sant'Angelo in Formis is an abbey in the municipality of Capua, southern Italy. The church, dedicated to St Michael Archangel, lies on the western slopes of Monte Tifata.
It was once referred to as ad arcum Dianae, as it lies on the remains of a Roman temple to that goddess.
The church was built in the eleventh century by Desiderius, the abbot of Monte Cassino, who also rebuilt that abbey. At Monte Cassino the decoration was carried out by Byzantine artists hired from Constantinople and the decoration of Sant'Angelo displays a mingling of the Byzantine and Latin traditions. The frescos were painted by Greek artists and by Italian pupils trained in their methods. Examples of the mingling of styles cited in Hall include:
1. The "lunette over the entrance with a half-length figure of St. Michael and above him an orant Virgin in a medallion supported by flying angels, with an inscription in Greek on the lintel at the foot. The treatment is wholly Byzantine except for the Latin motif of a crown on the Virgin's head".
2.