 The ground floor now houses the cathedral's gift shop.The piazza boasts several small fountains and a number of other medieval buildings, but it is dominated on its north-facing side by the Palazzo dei Papi di Viterbo, which was enlarged and reconstructed in 1266 following the Papal move to the city.The Palazzo was the original location of the initiation of the conclave tradition, taken from the Latin "cum claves" or "with keys".