Church of St. John in Penhow was erected at the end of the twelfth or early thirteenth century on the initiative of the De Maurs family, who also built a nearby castle. In the later part of the 13th century it was extended by the southern nave, and in the fifteenth century, a porch was added. In the eighteenth and early twentieth century, the church was renovated.
The church consists of a rectangular nave and a rectangular, but narrower and shorter chancel. On the south side a tower was erected, and then in the 13th century, on its both sides the southern nave. In the fifteenth century, a porch was added to it. A sacristy adheres to the north side of the presbytery. The windows of the church were repalced at the beginning of the twentieth century, however, in the chancel has preserved the original, double piscina and baptismal font from the 13th century.
Website britishlistedbuildings.co.uk, Parish Church of St John the Baptist A Grade II Listed Building in Penhow, Newport.