The Richard E. Ahlborn Slide Collection contains more than 3,000 slides created and collected by Ahlborn over his extensive career as a photographer, curator, and scholar of Mexican American art. Slides include images of artworks, architecture, buildings (especially churches), towns, crafts/furniture, graphic art pieces, tools, textiles, and religious objects. The majority of the slides relate to Mexican, United States, Central American, South American, and Spanish objects and locations, though there are smaller sets of images from China, Japan, Italy, and the Philippines. Individual slides in the collection are labeled by location, at the very least, but usually with additional details.