The Cathedral of San Sabino (St. Sabinus), formerly called the Cathedral of Santa Maria Assunta (St. Mary of the Assumption) faces, in all its grandeur, onto Piazza dell'Odegitria (literally, Square of the Hodegetria; “Our Lady who shows the way”). The cathedral is located in the western part of the old town, steps away from the Norman Hohenstaufen castle. Pre-millenary structures and important archaeological finds discovered in the Succorpo, the excavated area under the cathedral (hypogeum), confirm its ancient origins that date back to the 5th-6th century, circa. The present church was rebuilt after the destruction of the city at the hands of the Norman King William the Wicked in 1156. The fundamental features of the cathedral resemble those of the Basilica of Saint Nicholas. Despite the similarities between the two churches, however, the Cathedral of San Sabino is the only church in the old city that can boast an imposing bell tower. It is the city’s most noble and ancient building, and its architectural elements bear witness to different historical periods through which it evolved over time, e.g. Roman, early Christian, Arab, Byzantine, Norman-Swabian. The building is also the seat of the Archbishop’s Curia as well as a landmark for the city’s ruling class. The cathedral has a cross shape with perpendicular arms, and is crowned by a dome upon an octagonal drum. The astounding reaction it stimulates would be the same as "if it soared in the Campo dei Miracoli, in Pisa...with the side baptistery and tall bell towers piercing the sky" (Nino Lavermicocca, Bari e le chiese della città vecchia, 2005). Today, the Palazzo Arcivescovile (Archbishop's Palace) is a Diocesan Museum and is situated on the right of the building, in via Dottula. The museum houses the most precious artefacts belonging to the millenary history of this Romanesque architectural gem. Three Exsultets, i.e. illuminated paschal rolls that are exposed and unrolled from the ambo during the Easter celebrations, are among the extremely precious works of art.