Boston has the oldest city archive in the United States and has recently embarked on an ambitious program to digitize more photos, maps, and other pieces of visual ephemera. This site offers a number of thematic photo collections, including ones dedicated to public institutions, city landmarks, the Boston Redevelopment Authority, and public celebrations. Visitors shouldn't miss the Peter H. Dreyer collection, which was gifted to the city by this well-known photographer. The 470 images in the collection document the city during the Bicentennial and in an era when the entire Hub was a bit less gentrified. The Bridge and Ferry photographs document the city's diverse set of engineering landmarks, along with images of the various machines and the men that crafted each of these unique structures. Finally, the School Department area offers up historic shots of the Horace Mann School for the Deaf and Hard of Hearing and other notable institutions.