"This building is like a Bach fugue." Anna Bofill means it, and she will explain it later, sitting on one of the benches in one of the four blue courtyards of the building she helped build from the Taller de Arquitectura. We are in Walden 7, this great mass in Sant Just Desvern that stands out from the highway and most people know only from hearing about it or from photographs. It's cold, and the interior is somber and imposing. It's no wonder some compare the building to a cathedral, perhaps Baroque like the musician, because in these ground-floor communal spaces there is a clear—and perhaps too obvious—desire for monumentality. But they achieve their effect. They are imposing, they fascinate. The apartments will be another matter later, which are of different types but in many cases cozy and, surprisingly, bright.