The church was first mentioned in the
Domesday Book of 1086, where it was recorded that the owner of the land north of the city intended to build a
Norman church there. The church was built for one Edwin, son of Godegose St Hugh also expanded the
St Mary Magdalen's Church to the south in 1194. Surviving 12th-century features of the church include two windows in the north side of the
clerestory of the
nave and the lower parts of the bell tower. The tower was finished early in the 13th century, which is the date of the
aisle arcades and
Early English Gothic lancet windows as well. The
Decorated Gothic chancel was built late in the 13th century. The tower space, occupied by an organ since 1953 but removed in 2025 pending replacement in 2028, features thick supporting columns crowned by 12C (c.1170)
Waterleaf capitals of simple flowing design. These were obscured until the removal of the organ. The capitals and surrounding sculptures and layout of the church including windows, are illustrated in detail by drawings in the book ''"Views and details of Saint Giles' Church, Oxford 1842 - Oxford : John Henry Parker for the Architectural Society"'' . ==During and after the Reformation==