High Quality Content by WIKIPEDIA articles! St Iestyn`s Church, Llaniestyn is a medieval church in Llaniestyn, Anglesey, in north Wales. A church is said to have been founded here by St Iestyn in the 7th century, with the earliest parts of the present building dating from the 12th century. The church was extended in the 14th century, with further changes over the coming years. It contains a 12th-century font and a 14th-century memorial stone to Iestyn, from the same workshop as the stone to St Pabo at St Pabo`s Church, Llanbabo.