The Roman and Visigothic town was discovered beneath the Clariana-Padellàs house and the Plaça del Rei. An extraordinary underground walk leads to the Palau Reial Major and the 14C Capella de Santa Águeda, housing the magnificent altarpiece of the Constable. Walk up a flight of steps to the side to reach the Mirador del Rei Martí, with its impressive view of the old perimeter of the city, with the dome of the Basílica de La Mercè in the background.