Augustinian canons, then a collegiate church
The abbey at Adamswood
The ruin at the edge of the village, in the townland of Adamswood, is what is left of a medieval church that began as a house of the Canons Regular of St Augustine - local tradition puts a foundation here as early as the tenth century, and the parish had a rich abbey and a corporation by 1109. A plaque on the wall claims it served as a seminary, a school of some standing; in 1678 the bishop is recorded ordaining priests from the school at Croagh. The church was cruciform once - chancel, nave, transepts and a tower - but the transepts were knocked, the arches blocked, and a crossing wall thrown in around the seventeenth or eighteenth century. The chancel was still roofed and in use when the antiquarian Thomas Johnson Westropp came through in the early 1900s. Look for the round-arched doorway, the single lancet, the piscina, and a two-light window. The graveyard around it has its oldest dated stone from 1802 - Denis Smith, aged twenty-eight.
A castle, and a king in retreat
The night James II slept at Amigan
Croagh had two castles by 1109, and one of them - Amigan Castle - carries the story that James II stayed there a single night in 1690, in the days after his defeat at the Battle of the Boyne, as he made his way south and west toward the coast and exile in France. It is the kind of one-night-stand history that small Irish places keep carefully: not a battle, not a siege, just a beaten king passing through and a roof over his head. Whether the stone he slept under still stands is another question - west Limerick is not short of vanished castles - but the name and the night have outlasted the building.
A cure for sore eyes, on the ninth of September
St Ciarán's well at Ballynakill
The parish keeps the feast of St Ciarán on 9 September, and his holy well sits out at Ballynakill beside an old church ruin, with steps cut down to the water. The well was held to cure sore eyes, and pilgrims made the rounds there, chiefly on the saint's day. It is the quiet, local kind of holy place - no car park, no signage to speak of - that you find by asking rather than by following a brown sign.