Calabria was part of the Byzantine Empire until the 11th century. A Greek monk, St. John Theristus, operated in the Stilaro Valley during the 9th century. His aghiasma ('holy font') became a popular center of local pilgrimage, and here a Byzantine monastery was founded in the 11th century. After the Norman conquest of southern Italy, it developed as one of the most important Basilian monasteries in southern Italy, maintaining its splendour until the 15th century, with a rich library and numerous art treasures.
It lived a phase of decline until 1579, when the founding of the Basilian Order of Italy restored it as the main Basilian center in southern Calabria. However, in the 17th century brigandage damaged the monastery, and the monks decided to moved to a bigger monastery outside the walls of Stilo, carrying with them the relics of the namesake saint. In the early 19th century, after the Napoleonic conquest of the Kingdom of the Two Sicilies, it was acquired by the comune of Bivongi, who sold it to private owners. In 1980 it was sold back to the municipal authority and, in the 1990s, restored to the Italian Basilian Order. In 2001, the Patriarch of Constantinople Bartholomew I visited the monastery and returned here the saint's relic from Stilo.
In July 2008, the city council of Bivongi has granted the use of the church for 99 years to the newly formed Romanian Orthodox Church in Italy.
The edifice is an example of transition between the Byzantine and Norman styles in architecture in southern Italy. Norman elements include the four corner pilasters closed by four arches, which support the dome, two of them being ogival.
Clearly Byzantine is the exterior, in particular in the external walls, in the fake columns of the apse, which forms ogival arches, and in the 16 small columns decorating the dome's tambour. The interior also houses traces of Byzantine frescoes, such as that portraying St. John Theristis.
References:Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).