St Margaret's

The Church of St Margaret, Westminster is in the grounds of Westminster Abbey on Parliament Square, London, England. It is dedicated to Margaret of Antioch, and forms part of a single World Heritage Site with the Palace of Westminster and Westminster Abbey.

The church was founded in the twelfth century by Benedictine monks, so that local people who lived in the area around the Abbey could worship separately at their own simpler parish church, and historically it was within the hundred of Ossulstone in the county of Middlesex. In 1914, in a preface to Memorials of St. Margaret's Church, Westminster, a former Rector of St Margaret's, Dr Hensley Henson, reported a mediaeval tradition that the church was as old as Westminster Abbey, owing its origins to the same royal saint, and that "The two churches, conventual and parochial, have stood side by side for more than eight centuries — not, of course, the existing fabrics, but older churches of which the existing fabrics are successors on the same site."

Wikipedia