[citation needed] Around 1380, St Pierre was owned by Sir David ap Philip, who served under King Henry V in France, and the name of his son, Lewis, was later adopted by his family and descendants as their surname.

The estate continued in the ownership of the Lewis family until 1924, although they had moved out of the mansion to the neighbouring Moynes Court in the late 19th century.

[1] The last member of the family to own the estate was Air Commodore Freke William Wiseman-Clark, who died without issue in 1908.

The church was restored in the Victorian manner by A. W. Maberly of Gloucester in 1873 to 1875, when altar front, screen and font were reinstalled, these having been removed during the Commonwealth period.

In the chancel are two ancient stone coffin lids, each bearing an inscription in Norman French, one to Urien de St Pierre, lord of the manor, who died in 1239 and the other to a contemporary cleric of the church, Rector Benet.

St Pierre Pill, 1 mile (1.6 km) south of the golf club on the Wales Coast Path, is an anchorage for small boats on the Severn Estuary.

A ninth-century source which refers to the harbour as Porth-is-Coed – a name later used for the nearby village of Portskewett – also provides the first description of the tidal cycle in Britain.

[15][16] According to Fred Hando, as recently as 1860, the harbour was navigable by 70-ton barges as far upstream as the present golf club.