St German’s Cathedral was founded in the early 13th century on site of 5th-8th century monastic cemetery and church. Some of the earliest surviving fabric is found in the north and south walls of the chancel, where plain walling of slate rubble, with some sandstone that includes the dressed stone of the ach mouldings to the lancet windows is thought to date to work undertaken c,1226 under the direction of Bishop Simon, representing the first phase of development at the cathedral.