The oldest parts of this majestic medieval cruciform church with its rich, glittering interior date from the year 1000. St. Servatius, Maastricht's first bishop, appointed around 380, is buried in the crypt. Over the centuries, worshipers have honored the saint with gifts, so the Treasury has a collection of incredible richness and beauty, including two superb 12th-century reliquaries fashioned by Maastricht goldsmiths. The basilica's interior is largely Romanesque, and restorations have given it a cool, restrained atmosphere, emphasizing the simple arches and vaults. A statue of Emperor Charlemagne stands in the church. The southern tower of the west wall holds Grameer (Grandmother), the largest bell in Holland and a beloved symbol of the city. In the summer, a daily concert is performed on the carillon from 8:30 to 9:30pm. The basilica was enlarged in the 14th and 15th centuries, when the south portal and the entrance to the cloister at Keizer Karelplein were added. These are adorned with statues and intricate stone carvings.