Modernista architects Joan Martorell and Lluís Domènech i Montaner both had a hand in this large, elaborate, former seminary, with Domènech i Montaner contributing its medieval flavour. It's now an international Spanish-language-and-culture study centre, the Centro Internacional de Estudios Superiores de Español . Visits inside the building are guided in Spanish; from June to September a daily 6pm tour runs in English. You can visit the grounds for free (unless you take a car in).