Thomas Annan was a Scottish photographer born in 1829, known for his significant contributions to the field of photography in the 19th century. He is particularly recognized for his work documenting the city of Glasgow and its social conditions during a time of rapid industrialization. His photographs captured the lives of the city's inhabitants and the changing urban landscape. Annan is best known for his series titled "The Old Closes and Streets of Glasgow," which showcased the narrow alleyways and tenements of the city. His work not only served as artistic expression but also as a historical record, providing insight into the living conditions of the working class during that era. He passed away in 1887.