Teampall Chiaráin is in the village of Mainistir (meaning monastery). It is said to have been founded by St Ciarán of Clonmacnoise who studied here under St Enda before sailing up the Shannon to establish his foundation at Clonmacnoise. The church which dates from about 12^th century stands on the old site of Mainistir Chonnacht. Several cross-decorated slabs stand near the church. These may be old Tearmann crosses( boundary crosses). The most striking one is immediately to the east of the church. It is well decorated and has a hole in it indicating it may have been used as a sundial. Traditionally islanders draw a handkerchief or scarf through the hole for luck or fertility.