Birkenhead Priory is in Priory Street, Birkenhead, Merseyside, England. It is the oldest standing building on Merseyside. The remains of the priory are recorded in the National Heritage List for England as a designated Grade I listed building, and it is a Scheduled Ancient Monument. It was founded about 1150 by Hamon de Masci, 3rd Baron of Dunham Massey for the Benedictine Order.