Church Island is a medieval Christian monastery and National Monument located in Valentia Harbour, Ireland. 
Location.
Church Island is located on a 1-acre (0.4 ha) island in Valentia Harbour, immediately west of Beginish, north of Knightstown.
History.
The island was anciently a centre for iron smelting.
The monastery was established in the 7th century AD.
Excavations by M. J. O'Kelly in 1955–56 turned up the remnants of a wooden oratory and a cross inscribed with Ogham. It also gave evidence of the diet of the monks: cod, ballan wrasse, oats, barley, gannet, shag, cormorant, goose, duck, beef, mutton, pork, goat meat, horsemeat and seal.
Description.
Contains the remains of a stone oratory, clochán (possibly a "hospitium"), and holy well.
References.
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