Thomas Allom was an English architect, artist, and topographical illustrator. He was a founding member of what became the Royal Institute of British Architects (RIBA). He designed many buildings in London, including the Church of St Peter's and parts of the elegant Ladbroke Estate in Notting Hill. He also worked with Sir Charles Barry on numerous projects, most notably the Houses of Parliament, and is also known for his numerous topographical works, such as Constantinople and the Scenery of the Seven Churches of Asia Minor, published in 1838, and China Illustrated, published in 1845.

The Royal Institute of British Architects (RIBA) is a professional body for architects primarily in the United Kingdom, but also internationally, founded for the advancement of architecture under its royal charter granted in 1837, three supplemental charters and a new charter granted in 1971.