Basilica of St Plechelm

The Basilica of St Plechelmus is a Catholic church in the Dutch town of Oldenzaal dedicated to the 8th-century Irish monk Plechelm, whose festival on 15 July has been on the calendar of the medieval diocese of Utrecht ever since his canonisation in the 10th century. This festival is still celebrated annually at the basilica, and the saint's 1050th anniversary was celebrated there in 2004.

Source: Wikipedia