Aghowle Church, church building in Coolkenno, County Wicklow, Ireland

Aghowle Church is a long rectangular granite church of c. 1100, 1.7 km southwest of Coolkenno in County Wicklow. Its original north, east and west walls and gables over 10 m high survive; the south wall is largely rebuilt. The west doorway is lintelled outside and arched inside, with Romanesque moulding and a draw-bar socket. Two round-headed east windows have hood mouldings on pillars, and a rare Romanesque piscina remains.

A monastery is said to have been founded here by Finnian of Clonard in the 6th century, with monks living in beehive huts around a wooden church. The present granite church was built around 1100 and served the Church of Ireland until 1716–17. It was the main ecclesiastical site of the northern Uí Felmeda, and its large size points to importance, though records do not explain why.

The name Aghowle comes from the Irish Achadh Abhall, meaning "field of apple trees". Local tradition holds that water from the large granite baptismal font east of St Finden's Cross could cure headaches. Legend also tells of a bell that kept returning to Aghowle after being moved to Clonard.

This is a protected national monument that can be visited freely but without guides on site. Walk carefully around the fragile stone structure and treat the area with respect, as there are no railings or safety features to prevent accidents.

Local legend holds that St Finnian (470–549) built a belfry at Aghowle but moved the bell to his monastery at Clonard; it vanished and kept reappearing at Aghowle however often it was taken away. The story gives no gold and no burial: the bell simply returns.