In 1609, Poland intervened into Russian affairs officially, captured Shuisky, and occupied the Kremlin. A group of Russian boyars signed in 1610 a treaty of peace, recognising Ladislaus IV of Poland, son of Polish king Sigismund III Vasa, as tsar. In 1611, False Dmitry III appeared in the Swedish-occupied territories, but was soon apprehended and executed. The Polish presence led to a patriotic revival among the Russians, and a volunteer army, financed by the Stroganov merchants and blessed by the Orthodox Church, was formed in Nizhny Novgorod and, led by Prince Dmitry Pozharsky and Kuzma Minin, drove the Poles out of the Kremlin. In 1613, a zemsky Sobor proclaimed the boyar Mikhail Romanov as tsar, beginning the 300-year reign of the Romanov family.