Porth Mawr Boundary Wall, Crickhowell, is built of coursed rubble and about 12ft high. It was constructed wholly or mainly in the late 18th or early 19th century. It is externally battlemented and almost certainly comprising part of the boundary wall of Carw Court.

Associated with:
Gatehouse (Nprn16106)
Gardens (Nprn86105)
House (Nprn16107).

RCAHMW AP965103/55