From the Casa Rosada, cross to the Catedral Metropolitana, which occupies the northwest corner of the square. The site has hosted a church since 1593, but the current building was started in 1752 and not completed until the mid-nineteenth century; its neoclassical façade — more reminiscent of a Parisian civic building than a Catholic cathedral — was added after independence. Inside, the mausoleum of General José de San Martín, the liberator of Argentina, Chile, and Peru, is guarded by grenadiers and can be visited for free. Pope Francis served as Archbishop of Buenos Aires for fifteen years before moving to the Vatican in 2013, and the cathedral now houses a small museum dedicated to him.