The Casas Muestra were intended for publicity and sales purposes. The first one was built in 1950 according to the project by Max Cetto in collaboration with Luis Barragán (Av. Fuentes 130). Next to it, on Av. Las Fuentes 140, followed the home acquired by the painter Roberto Berdecio and designed by Max Cetto in 1951. Along with these residences, the Model Gardens were intended to entice prospective buyers and demonstrate the Pedregal's potential as a site for garden-homes. They were to illustrate Barragán's idea of "correct" building, promoting the sort of "harmony" between architecture and landscape that Barragán desired. Occupying about , these gardens were enclosed by volcanic-stone walls and iron fences and entered through metal or rough-hewn wood gates.