Thomas Annan (1829-1887) founded his photographic studio in Glasgow in 1857. He was a specialist in architectural photography. Annan is best known for his 'Photographs of the Old Closes and Streets of Glasgow', published by the firm in 1878-9. Upon his death in 1887, his elder son, John, took over the business which became 'Annan and Sons' in 1888. Annan's younger son, James Craig, made his own name as a Pictorial photographer.