Thomas Henry Wyatt was an Anglo-Irish architect. He had a prolific and distinguished career, being elected President of the Royal Institute of British Architects 1870–73 and being awarded its Royal Gold Medal for Architecture in 1873. His reputation during his lifetime was largely as a safe establishment figure, and critical assessment has been less favourable more recently, particularly in comparison with his younger brother, the better known Matthew Digby Wyatt.

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.