Haus der Stadtsparkasse and the Stadtwaage, the former weigh house (built in 1588), with an ornate Renaissance façade, and the nearby Essighaus, once a fine Renaissance town house. The façades and houses surrounding the market square were the first buildings in Bremen to be restored after World War II, by the citizens of Bremen themselves. St Peter's Cathedral (13th century), to the east of the Marktplatz, with sculptures of Moses and David, Peter and Paul and Charlemagne. The Bismarck Monument is also outside the cathedral, which is the only monument in Germany to depict Otto von Bismarck in an equestrian format. On Katherinenklosterhof to the northwest of the cathedral, a few remaining traces can be found of St Catherine's Monastery dating back to the thirteenth century. The Liebfrauenkirche (Our Lady's Church) is the oldest church of the town (11th century). Its crypt features several impressive murals from the fourteenth century. Off the south side of the Markplatz, the Böttcherstraße was transformed in 1923–1931 by the coffee magnate Ludwig Roselius, who commissioned local artists to convert the narrow street (in medieval times, the street of the barrel makers) into an inspired mixture of Gothic and Art Nouveau. It was considered "entartete Kunst" (degenerate art) by the Nazis. Today, the street is one of Bremen's most popular attractions, with the Glockenspiel House at No. 4 with its carillon of Meissen porcelain bells. At the end of Böttcherstraße, by the Weser bank, stands the Martinikirche (St Martin's Church), a Gothic brick church built in 1229, and rebuilt in 1960 after its destruction in World War II. Tucked away between the Cathedral and the river is the Schnoor, a small, well-preserved area of crooked lanes, fishermen's and shipper's houses from the seventeenth and eighteenth centuries, now occupied by cafés, artisan shops and art galleries. The Convent of Saint Birgitta (Birgittenkloster) founded in 2002 is a small community of just seven nuns offering guest accommodation. Schlachte, the medieval harbour of Bremen (the modern port is some kilometres downstream) is today a riverside boulevard with pubs and bars aligned on one side and the banks of Weser on the other. The Viertel district to the east of the old town combines rows of nineteenth-century Bremen houses (Bremer Häuser) with museums and the theatres of Theater Bremen along the city's cultural mile (). Knoops Park which is one of the larger green spaces in the city that