Under Norman rule the Pembrokeshire landscape underwent great changes, particularly in the south where large numbers of peasant settlers, many from Flanders, colonised the area in the twelfth century. New villages were established on a planned lay-out. Rosemarket, near Neyland, is one of several around Milford Haven founded on Norman lines, typically laid out along a main street, with a church, village green and nearby open fields which have now been enclosed. It was sited close to a circular Iron Age fort, possibly re-fortified at this time.

David Leighton, RCAHMW, 13 November 2008