The Church of the Holy Trinity was probably built in the 9th century. It was rebuilt after its dome collapsed during the Pre-Romanesque era and was then rededicated. Based on an inscription, which was found in the older parts of the Church, it is supposed that the church was first dedicated to the Saint Archangel Michael.
Its an edifice with a sex leaf ground plan and a dome. Each apse has three shallow niches except the Western one which has a door and two niches. The presbyterian part includes three eastern apses with windows in the central niche.