The interior of this 15th-century building, home of the Municipal Archives (upstairs), has superb views of the remains of the 4th-century Roman watchtowers and walls. Look at the Montjuïc sandstone carefully, and you will see blocks taken from other buildings, carved and beveled into decorative shapes, proof of the haste of the Romans to fortify the site as the Visigoths approached from the north, when the Pax Romana collapsed. The marble letter box by the front entrance
was designed in 1895 by Lluís Domènech i Montaner for the Lawyer's Professional Association; as the story goes, it was meant to symbolize, in the images of the doves, the lofty flight to the heights of justice and, in the images of the turtles, the plodding pace of administrative procedures. In the center of the lovely courtyard here, across from the Santa Llúcia chapel, is a fountain; on the day of Corpus Christi in June the fountain impressively supports l'ou com balla, or "the dancing egg," a Barcelona tradition in which eggs are set to bobbing atop jets of water in various places around the city.