Portchester Church, Hampshire. Portchester is derived from its former Latin name Portus Adurni and the Old English suffix ceaster (“fort; fortified town”). It is 4 miles northwest of Portsmouth, England. The parish church of St Mary’s, is listed as a Grade I protected building. This antique copper-plate engraved print of St Mary’s Church, is dated in the plate 28th of July 1785. Size of engraved area approx 5x6ins. .