Urban was very active in church affairs: he published the revised breviary, normalized liturgical practice, canonized many saints, instituted new orders, and continued the reformation of the church. He built and decorated extensively in Rome. Urban sanctioned the second condemnation of Galileo for his support of the Copernican theory that placed the sun, rather than the earth, at the center of the universe, but later freed him. He condemned the posthumous work of Cornelis Jansen,
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