Be certain to obtain all rights in a photograph that you may want to include in your materials. The more obvious required permission is that of the photographer. Obtain either an assignment from the photographer or a license to use the image in all of your intended ways. The less obvious permission is obtaining the rights from people depicted in the photograph. They each have a right of publicity, and the ability to use the photo requires a license from the depicted people. Heirs may still have a right of publicity in the photo or likeness of a deceased person, depending on the state where they resided at the time of death. Maryland, however, does not recognize a post-mortem right of publicity. If a building has unique artistic features, you may need the permission of the building owner as well.