St Jarlath, after being baptised a Christian, was told that he should settle wherever his chariot wheel broke. It broke in Tuam. They show you Temple Jarlath, the mound around which the town of Tuam grew.
The broken chariot wheel is one of the symbols of the town. I saw it in the stained glass depiction of the saint in the Catholic Cathedral. It is also in his stained glass depiction in Kilbannon, about three miles to the east: Bannon was the saint who baptised Jarlath, Bannon himself having been baptised by Patrick.
Tuam’s first bishop was O Hoisin (Hessian). That was when the dioceses of Ireland were created in 1152. On the surviving shaft of a high cross in the Protestant Cathedral, Hessian’s name appears. The other name carved in the stone is Jarlath