He now proclaimed himself openly a supporter of Zwingli, advocated the new teaching on justification and good works, and attacked several Catholic doctrines and practices. For him, as indeed for most of the other reformers, clerical celibacy was the great stumbling block. He encouraged his followers by taking as his wife a young widow, who was subsequently in turn the wife of the two renowned Lutheran preachers, Butzer and Capito. At first the city authorities and a large body of the university professors were against him, but owing to the disturbances created by his partisans full liberty of worship was granted to the new sect (1527). Not content with this concession, they demanded that the Mass should be suppressed. In 1529 the followers of Oecolampadius rose in revolt, seized the arsenal of the city, directed the cannon on the principal squares, and attacked the churches, destroying altars, statues, and pictures. Erasmus, disgusted with such methods of propagating religion, left Basle and sought a home in Freiburg. The Catholics were expelled from the city council, their religion was proscribed, and Basle joined hands with Zurich in its rebellion against the Church. The revolt soon spread into other cantons of Switzerland. In Berne and Schaffhausen both parties were strong and determined, and for a time the issue of the conflict was uncertain, but in 1528 the party of Zwingli and Oecolampadius secured the upper hand. Similarly in St. Gall, Glarus, etc., victory rested with the new teaching. Other cantons, as for example, Solothurn, wavered as to which side they should take, but the three oldest cantons of Switzerland, Uri, Schweiz and Unterwalden, together with Zug, Freiburg and Lucerne, refused to be separated from the Church.