With around 90,000 small and 30,000 large-format slides, the ifag holds the largest slide collection in the Faculty of Architecture and Urban Planning. The focus is European architectural history. From early large-format slides on glass to small-format slides in standardised plastic frames, the collection traces the development of the medium over the last 100 years and demonstrates its importance for teaching and research. The surviving slide negatives and dialists allow the development of the collection to be traced in detail.
In addition to the slides, the image archive contains small stocks of historical photographs and postcards as well as a set of historical educational charts on the architecture of Rome.
From 2007, the slide library was one of the starting points for the digital image database easyDB, which is located at the Institute of Art History of Faculty 9. The historical large-format slides were also almost completely digitised in a separate research project in 2011.