The Trentoniana Department’s collection of photographs includes the city's earliest captured images of events, clubs, sports teams, political activities, public celebrations, street scenes, buildings, people, and more. They date from the mid-1800s to the present.

Currently stored in boxes and organized by subject, the collection of over 200,000 photographs are only accessible in the Trentoniana room. Plans are underway to begin digitizing images and making them available online.