Abstract: A mounting corner usable with several other like mounting corners for the mounting of photographs, posters, drawings and the like on a mounting surface, this mounting corner being constructed from relatively thick, rigid material, and having substantially flat, triangularly-shaped front and rear surfaces. Two edge portions of the front and rear triangularly-shaped surfaces meet at a right angle, whereas the hypotenuse edge of each mounting corner is slotted to receive the respective corner of a photograph, poster, drawing or the like. Securing means selected from a variety of different types is utilized upon the rear surface of each mounting corner, thus enabling our mounting corner to be attached to a mounting surface of ferric metal, as well as upon surfaces such as wood, felt-board, cork, ceramic and the like, depending upon the particular securing means utilized in a given instance.