This is the the Round Tower of Armoy which stands in the grounds of St. Patrick's Parish Church.
The tower is about 11 meters high and has three storeys.
The entrance door is now 1.6 meters above ground level, this would have been much higher but burials over the last few century's have seen the ground rise.
The tower (11th/12th Century) is all that remains of an early monastery which was founded about AD 460 by Saint Olcán, a disciple of Saint Patrick.
At the time Armoy was the main religious settlement in the Irish part of the kingdom of Dál.