At the Mercedes-Benz Museum, I saw a photo of a housing development that I remembered studying in Design History class: the Weissenhof Estate. I'd forgotten it was in Stuttgart! So I went online to check out the place, called to verify that they were open (since it was Monday, and also the May 1 holiday), and hurried to take the train and bus back over to the west side of town.
The Weissenhof Estate was a model development by the city of Stuttgart planned by Mies van der Rohe, and designed to experiment with new models of housing. It was an image of this townhouse complex designed by J.J.P. Oud that made me suddenly remember the slides in Design History class.