Teresian College, Barcelona

The College of Saint Teresa on Carrer de Ganduxer, a school and convent Gaudí took over in 1889 for Enric d'Ossó's Teresian order. Money was short, so he built in brick and plaster rather than stone, and the plain block works through repetition instead of ornament. Look along the roofline: each pointed merlon is crowned by a doctoral cap, a tribute to Saint Teresa as a Doctor of the Church. Inside, the corridors run under rows of narrow parabolic arches. It is still a working school, so most visitors see it from the gate.