Current photo of site
|Denomination||Roman Catholic, Anglican|
The church stood on the south side of Thames Street in Dowgate ward, to the east of the All Hallows the Great. In some early records it is called "Allhallows on the Cellars", as it stood on vaults. The steeple and choir were built over an arched gateway, which formed the entrance to a house called Cold Harbour.  The area was known as The Ropery.
The first mention of the church is from 1216, and in 1387 two adjacent houses were given to expand the church.The choir, having fallen down, was rebuilt in 1594 at the cost of the parishioners. The church was renovated again in 1616; at this time dormer windows were installed on the south side, "the interior, being very dark and gloomy". Three galleries were added in 1633.
The church was destroyed, along with most of the churches in the City, by the Great Fire of 1666. In 1670 Parliament passed a Rebuilding Act and a committee was set up under the stewardship of Sir Christopher Wren to decide which churches would be rebuilt. All-Hallows-the-Less was not amongst those chosen; instead the parish was united with that of All-Hallows-the-Great, and the site of the church retained as a burial ground.
All-Hallows-the-Great itself was demolished in 1894 and the united parishes were in turn joined with that of St Michael Paternoster Royal under the Union of Benefices Act 1860. In 1896 many bodies were disinterred from the churchyard and reburied at Brookwood Cemetery. The last physical evidence of the existence of All-Hallows-the-Less, an old watch house, was destroyed during the Second World War.
- ***Harben Dictionary Window***
- Newcourt, Richard (1708). Repetorium Ecclesiasticum Parochiale Londinense. 1. London. p. 250–1.
- Pearce, C.W. (1909). Notes on Old City Churches. Winthrop Rogers.
- "The London Encyclopaedia" Hibbert,C;Weinreb,D;Keay,J: London, Pan Macmillan, 1983 (rev 1993,2008) ISBN 978-1-4050-4924-5
- White, J.G. (1901). The Churches and Chapels of Old London.
- Whinney, Margaret (1971). Wren. London: Thames & Hudson. ISBN 0-500-20112-9.
- Pearce, Charles William (1909). Notes on old London city churches : their organs, organists, and musical associations. London: Vincent Music Company. p. 158.
- Clarke, J.M (2006). The Brookwood Necropolis Railway. Usk: Oasdale. ISBN 978-0-85361-655-9.
- Clark, William A. - Watch house of Allhallows the Less, Upper Thames Street-1930 photograph p5355937 cited in "City of London Parish Registers Guide 4" Hallows,A.(Ed) : London, Guildhall Library Research, 1974 ISBN 0-900422-30-0