Abstract: A system for hanging multiple pictures, photographs, picture frames, or other objects, collectively referred to herein as pictures, in a collage, using a regularly-spaced grid of pegs or other supports that are attached to a wall. Each picture includes one or more sockets, generally along the top of the picture, or one or more of its edges, although in some embodiments a picture can include sockets located elsewhere on the picture. A picture can be attached to the grid by placing it on the grid so that its sockets are supported by the pegs. In accordance with an embodiment, to add a picture to the wall, a user places the top edge of the picture over the grid until its sockets fit around the pegs, and then allows the picture to swing into the wall until it rests against the wall or other supports. To remove the picture, the user gently lifts the picture off the pegs and removes it from the wall. This process can be repeated with multiple pictures to create or change a wall-mounted collage.