 The tsar pressed on towards Kazan, and the final siege of the Tatar capital commenced on 30 August.Under the supervision of Prince Alexander Gorbatyi-Shuisky, the Russians used ram weapons, a battery-tower, mines, and 150 cannon.The Russians had the advantage of efficient military engineers, such as Ivan Vyrodkov, Nemchin Erazm ("Rozmysl")
from the Grand Duchy of Lithuania, and the English engineer Butler.