Hidden in a residential apartment block in Gràcia, the Estudi Oleguer Junyent preserves the studio of a Barcelona polymath who designed opera sets, decorated grand houses, painted, traveled the world, and collected medieval art. Today his studio still feels lived-in—walls lined with reliquaries, Gothic panels, and even a Baroque sculpture by La Roldana. It’s hard to find, but it’s one of the city’s richest, most personal collections.