What is "llangristiolus"

Llangristiolus is a village in the middle of Anglesey, Wales, southwest of Llangefni, and is named after Saint Cristiolus. The River Cefni flows through the village. The village is within a mile of the A5 and A55 roads.

The church of St Cristiolus, Llangristiolus, dates from the 12th century.