The church of Santa Maria dell'Isola was probably founded in the 11th century, on a rock inhabited since the 7th-8th centuries by hermits. After the earthquakes of 1783 and 1905, very little of the original structure was preserved.
Nicastro Cathedral was built in the Byzantine period in an unknown place. In 1100, Countess Eremburga, niece of Robert Guiscard, built a new cathedral dedicated to Saints Peter and Paul, majestic and in Romanesque style. This building collapsed in the earthquake of 1638, and in 1640 Bishop Giovan Tommaso Perrone began building a new cathedral on the present site. At the end of the 19th century, the 17th-century facade completely lost its architectural character, and the facade was modified again in 1925, resuming its current design. In 1935, the maiolica-covered dome was raised and in the middle of the 20th century, the present staircase was built.
The Cattolica is a small Byzantine church built in the 10th and 11th centuries. The name Cattolica was to designate a category of "privileged churches", the term "katholikì" was given only to churches with baptismal fonts. Subjected to the Byzantine Empire until the 11th century, Calabria today preserves many testimonies of oriental art, the Cattolica is a good example.