Records created by the headquarters of the Mothers' Union (MU), Mary Sumner House, Westminster. Founded to promote the sanctity of marriage and Christian family life, the MU was primarily interested in the morality of society, and its activity ranged from petitioning parliament to running family fun days. By the early 20th century, the MU had established itself in dioceses overseas, undertaking a mix of missionary and development work.
The archive comprises minutes, correspondence, accounts, pamphlets, architectural plans, photographs and slides. The majority of the archive dates from the 1890s onwards, as it was not until then that the Mothers' Union established a centralised structure. The papers also contain a few series of documents originating from members who, although not always based at Mary Sumner House, played important roles within the organisation.