A 6th-century foundation in the kingdom of Osraige
St Canice's monastery
St Canice founded the monastery at Aghaboe in the 6th century, and it became one of the significant houses of the early Irish church - a centre of learning, copying and farming. It was plundered by the Vikings in 913, rebuilt in 1052 with the relics of St Canice enshrined, burned again in 1116, and rebuilt. For a time it was the chief church of the kingdom of Osraige (Ossory) before that role passed to Kilkenny. In 1346 the town, the church and St Canice's shrine were burned by Diarmaid Mac Giolla Phádraig, chief of Upper Ossory.
Aghaboe's astronomer abbot, canonised in 1233
Fergal of Salzburg
The most remarkable man to come out of Aghaboe was St Virgilius - Fergal, or Feargal - who was abbot here in the 8th century. He left Ireland for the continent, became Bishop of Salzburg in present-day Austria, and built the first cathedral there. He was a noted geometer and astronomer, and is said to have argued for the existence of other inhabited lands, which got him into trouble with Rome. He was canonised in 1233. Not bad for a small monastery in a Laois field.
1382, suppressed 1540
The Dominican friary
The fine ruin standing in the field is a Dominican friary, founded in 1382 by Finghin Mac Giolla Phádraig, Lord of Upper Ossory, on the old monastic ground. It is a long, barn-like preaching church without aisles - the typical plan of the mendicant orders - and its best feature is a beautifully carved three-light window in the east wall. Inside there is an ogee-headed piscina on the south wall and a tall arched niche, the kind of detail that rewards looking up. The friary survived until the Dissolution of the Monasteries in 1540.
Georgian parish church and a Norman earthwork
The 1818 church and the motte
A small Church of Ireland church was built across the site in 1818, reusing older stone, with an odd tower - a square lower section and an octagonal upper part that may itself be medieval - and three weathered carved heads over the west door. A short walk away, the tree-covered remains of a Norman motte rise out of the ground, the earthwork castle of the later medieval settlement. Monastery, friary, church and castle, all within a few hundred metres.