Fotoreproductie van een schilderij, voorstellende een portret van John Spreull

Thomas Annan was a Scottish photographer who pioneered documentary photography in the mid-19th century, primarily working in portraiture and architectural record. Operating from Glasgow, he became known for large-format albumen prints that captured the city's industrial character and urban fabric with forensic precision. His systematic photographic surveys of Glasgow's medieval streets and buildings, undertaken before their demolition, established him as a foundational figure in architectural photography. Annan worked primarily in albumen and collodion processes, favoring clarity and tonal range over romantic effect.