Sewardsley Priory was a Priory occupied by Cistercian nuns in Showsley near Towcester, West Northamptonshire, England.

The priory was established in the 12th century by a gift of Richard de Lestre during the reign of King Henry II.^[1]

Following the Dissolution of the Monasteries, the details of the location and arrangement of the Priory buildings had been lost until 2006. In that year, a portion of a building wall was found during a private excavation. This led to a brief but extensive archaeological study of the site.

The Channel 4 program Time Team (series 14, episode 4), spent three days at the site during the 2007 digging season.

The program first aired in January 2008, and has subsequently been re-aired on satellite TV channels.