Historic Monserrat bustles with tourists and government officials. Focal point Plaza de Mayo is ringed by iconic buildings like the pink Casa Rosada presidential palace and colonial-style Cabildo museum. The Illuminated Block, a former Jesuit complex, is now a cultural center. Eclectic landmarks on Avenida de Mayo include Palacio Barolo, a neo-Gothic high-rise, and Café Tortoni, a storied coffeehouse from the 1850s.