He would place man at the center of His cosmos. In 1616 the Church sent Galileo formal warning that they considered his theory a denial of Christian doctrine. Thus he refrained from publishing anything about his theories for the next decade, but the ascension of a liberal Pope, Urban VIII, encouraged him to publish the Dialogue Concerning the Two Chief World Systems in 1632, which openly argued for the Copernican system. The Church now accused Galileo of heresy, tried him before the Inquisition, and forced him to renounce his views and submit to the Church.