of extreme taxes. Folklore says that especially the beer tax increase caused much anger. Afterwards Magdeburg was under a ban, and only after the donation of five atonement altars did the construction of the cathedral continue under Archbishop Otto von Hessen. Otto was also able to complete the interior construction, and formally opened the dome in 1363 in a week-long festival. At this time the cathedral was dedicated not only to St Maurice as before, but also to Saint Catherine. In 1360 the construction stopped again after the uncompleted parts have been covered provisionally. Only in 1477 did the construction start again under Archbishop Ernst von Sachsen, including the two towers. The towers were constructed by master builder Bastian Binder, the only master builder of the cathedral known by name. The construction of the cathedral was completed in 1520 with the placement of the ornamental cross on the north tower. Luther, the Swedes, and Napoleon On October 31, 1517 Martin Luther published the 95 Theses in Wittenberg, Germany, which date is used as the start of the Protestant reformation. Luther also preached in Magdeburg in 1524. Some smaller churches in Magdeburg changed to Protestantism soon thereafter. The unpopularity of Archbishop Albrecht von Brandenburg also furthered the reformation, and after his death in 1545 in Mainz there was no successor. Magdeburg became a leader in the Protestant reformation, and was outlawed by the emperor. The Catholic church stored the cathedral treasure in Aschaffenburg for safekeeping, but the treasure was later lost to the Swedes in the Thirty Years' War. The priests of the cathedral also changed to Protestantism, and on the first advent Sunday in 1567, the first Protestant worship service was held in the cathedral. The largest bell, the "Maxima" with 10 tons in the south tower, falls down and was destroyed in the 1540th years. Heinrich Compenius built 1604/05 his famous main organ with the "Golden Chick". In 1631, during the Thirty Years' War (1618–1648) Magdeburg was raided, and only a small group of 4000 citizens survived the murdering, raping, and looting (known as the sack of Magdeburg) by seeking refuge in the cathedral. The head priest, Reinhard Bakes, begged on his knees for the lives of his people before the conqueror Johan t'Serclaes, Count of Tilly. The cathedral survived the fires in the city, and was dedicated again to the Catholic religion. However, as Tilly's catholic forces left