The Sunday School Union had been set up on 13 July 1803[1] "to encourage teachers to communicate with each other, improve methods, and support the opening of new schools".[2] Over the years local auxiliaries were set up in London and then around the country. These became "local Unions affiliated to the now termed ‘National Sunday School Union’ (NSSU)".[2]
The address of the Sunday School Union in the early years of the 20th century was 57 and 59 Ludgate Hill, London, E.C.[3] The office of the National Sunday School Union was located at the same address in the late 1920s.[4] In 1964 the latter organisation became the National Christian Education Council[5] which in 2002 combined with the Christian Education Movement to form Christian Education.[6][7]
The Canadian branch (the Sunday School Union Society of Canada) was established in Montreal in 1822.[8]