PRN 70527 This church was a proprietary foundation, founded by Osbert the Sheriff who was sheriff of Yorkshire and Lincolnshire in the last years of the 11th century. Osbert gifted the church to the cathedral and it was confirmed in the cathedral records in 1114. The church survived throughout the medieval period and well into the post medieval period until its parish was united with St Peter Eastgate in 1778. It was demolished shortly afterwards (c.1781). 18th century illustrations of the church show late medieval additions to its fabric including a a north east chapel with a flat lead roof, indicating that the church was still being maintained and invested in in the late medieval period. The churchyard continued in use after the destruction of the church itself, being used as an overspill graveyard for St Peter Eastgate after the amalgamation of the parishes until the 19th century. The churchyard was originally larger, but houses were built over it along its Pottergate frontage in the 12th century. {1}{5} Drawings of the church show a squat tower with double belfry openings, evidently of Norman date. In 1847 a stone coffin was recovered near the church site. In the coffin was an inscribed cruciform lead plaque. The inscription mentions Siford, who may be identified with Siward the priest who was a lawman in 1066. The inscription also mentions a dedication to St Helen, something not mentioned in any other source. {2} The west tower shown on 18th century drawings is now believed to be an atypical example of the 'Lincolnshire Tower' type, probably one of the mid 12th-century derivatives. It stood to the south-east of the cathedral with a churchyard extending from the line of Greestone steps to the east, to Pottergate to the west and to Minster yard to the north. It is marked as St Margaret's burial ground on 19th century maps. {7}