Bishop Wanga benefitted from his drained mines. The ‘hyperactivity’ of silver production and trade, coupled with the economic gains of agrarian surpluses, sustained the wealth of Bishop Wanga. We lack exact figures about the incomes that Wanga had at his disposal for personal consumption. But evidence shows that the rule of Bishop Wanga was wholly tied to the subterranean wealth of his district. First, the bishop expanded public infrastructure works in the city. He built the Wanga Tower (a.d. 1208–1212), with its imposing bell eager to roar citizens and peasants alike when the bishop wanted to gather all. The domus murata built in the lower part of the tower protected and defended the Adige River bridge. It was a costly public infrastructure work that suddenly revealed to neighboring Alpine districts the power of solvency of the Prince-Bishop. The domus murata was a large, imposing, two-level structure, measuring approximately 10 by 11 meters. Completed almost two decades after the government of Wanga, the wall protected the bridge leading to the urban quarter of the city. Along with Wanga Tower, the domus murata guarded the western side of the city that led to the Sarca Valley.