the upper levels of the nave are ashlar, using sandstone from Isny im Allgäu. Limestone from the nearby Swabian Jura was used in small quantities. Works of art Late medieval sculptures include the tympanum of the main Western entrance depicts scenes from the Genesis. The central column bears a sculpture, the Man of Sorrows, by the local master Hans Multscher. The 15th century choir stalls by Jörg Syrlin the Elder, made from oak and adorned with hundreds of carved busts are among the most famous pews of the Gothic period. The pulpit canopy is by Jörg Syrlin the Younger. The original high altar was destroyed by the iconoclasts of the Reformation. The current altarpiece from the early 16th century is a triptych, showing figures of the Holy Family and the Last Supper in the predella. The five stained glass windows of the apse, which is in the form of half a decagon, show Biblical scenes and date to the 14th and 15th century. The main organ of the church was destroyed by iconoclasts and replaced in the late 16th century. Wolfgang Amadeus Mozart is known to have played it in 1763. For some decades it was the largest organ in existence. In the late 1960s it was reconstructed to solve acoustic problems of reverberation. In 1877, the Jewish congregation of the synagogue of Ulm—including Hermann Einstein, the father of Albert Einstein—donated money for a statue of the Biblical prophet Jeremiah. The figure was placed below the main organ. Later renovations in the modern era added gargoyles and a sculpture, The Beggar, by the expressionist Ernst Barlach. Bells The tower contains 13 bells in total and only 10 of the 13 swing. 6 bells in including the largest bell, Gloriosa were cast by Heinrich Kurtz in Stuttgart 1956. Leichenglocke is responsible to chime the quarter-hours and the second largest bell Dominica chimes the hours. Plan Measurements The height of the steeple is . Ulm Münster is the world's tallest church The church has a length of and a width of . The building area is approximately . The height of the central nave is , whilst the lateral naves are high. The volume of the edifice is some . The weight of the main steeple is estimated at . The church seats a congregation of 2,000. In the Middle Ages, before pews were introduced, it could accommodate 20,000 people, when the