Czech Baroque architecture refers to the architectural period of the 17th and 18th century in Bohemia, Moravia and Czech Silesia, which comprised the Crown of Bohemia and today constitute the Czech Republic. The spread of the Baroque style in the Crown of Bohemia was coupled with the victory of the Catholic Church during the Thirty Years' War when the Catholic Church became the only legal church in the Kingdom of Bohemia (from 1627) and Margraviate of Moravia (from 1628). The heyday of Baroque style in the Czech lands can be seen in the early 18th century.