The original parish church, dating from the 11th century, was some distance to the east of the current location, on the site now occupied by Bishop Creighton Academy. When the centre of Peterborough moved west, the church was relocated stone by stone. Construction of the current church began in 1402 and it was dedicated to St John the Baptist on 26 June 1407. The church was refurnished in High Anglican manner in 1938 and incorporated a new rood and elaborately painted and gilded timber reredos with carved figures under heavily traceried canopies. In 1968 a new stained-glass window, designed by
Brian Thomas, was installed. It depicts notable people connected to Peterborough:
Symon Gunton, vicar of the parish during the plague, between 1665 and 1667 (d.1676), Nurse
Edith Cavell (d. 1915), Captain Thomas Mellows (d. 1944, fighting in the
French Resistance), and
William Law (d. 1761). The window is dedicated to James Ruddle (1830-1898) and to his wife Edith. James Ruddle was a prominent local architect who worked extensively in the Peterborough area and was the son of local carpenter
Francis Ruddle. St John the Baptist received a Grade I heritage listing in 1952 as a prominent and "architecturally ambitious parish church... exemplifying Perpendicular town church design." Its "very fine" south porch, 15th century font, 20th century screens, interesting monuments and tombs were also noted. ==References==