of the archbishops who also promoted iconography and patronized church construction. The Novgorod merchant Sadko became a popular hero of Russian folklore. Novgorod was never conquered by the Mongols during the Mongol invasion of Rus. The Mongol army turned back about from the city, not because of the city's strength, but probably because the Mongol commanders did not want to get bogged down in the marshlands surrounding the city. However, the grand princes of Moscow, who acted as tax collectors for the khans of the Golden Horde, did collect tribute in Novgorod, most notably Yury Danilovich and his brother, Ivan Kalita. In 1259, Mongol tax-collectors and census-takers arrived in the city, leading to political disturbances and forcing Alexander Nevsky to punish a number of town officials (he cut off their noses) for defying him as Grand Prince of Vladimir (soon to be the khan's tax-collector in Russia) and his Mongol overlords. In the 14th century, raids by Novgorod pirates, or , sowed fear as far as Kazan and Astrakhan, assisting Novgorod in wars with the Grand Duchy of Moscow. During the era of Old Rus' State, Novgorod was a major trade hub at the northern end of both the Volga trade route and the "route from the Varangians to the Greeks" along the Dnieper river system. A vast array of goods were transported along these routes and exchanged with local Novgorod merchants and other traders. The farmers of Gotland retained the Saint Olof trading house well into the 12th century. Later German merchantmen also established tradinghouses in Novgorod. Scandinavian royalty would intermarry with Russian princes and princesses. After the great schism, Novgorod struggled from the beginning of the 13th century against Swedish, Danish, and German crusaders. During the Swedish-Novgorodian Wars, the Swedes invaded lands where some of the population had earlier paid tribute to Novgorod. The Germans had been trying to conquer the Baltic region since the late 12th century. Novgorod went to war 26 times with Sweden and 11 times with the Livonian Brothers of the Sword. The German knights, along with Danish and Swedish feudal lords, launched a series of uncoordinated attacks in 1240–1242. Novgorodian sources mention that a Swedish army was defeated in the Battle of the Neva in 1240. The Baltic German campaigns ended in failure after the Battle on the Ice in 1242. After the foundation of the castle of Viborg in 1293 the Swedes