The Cathedral of Assumption of Virgin Mary and St. John the Baptist was originally built between 1280 and 1320 in the early-Gothic style. It was the earliest cathedral to be built in the country and was also the largest church in the country before the construction of St. Vitus. In 1421, the premises of the Sedlec Monastery were plundered by the Hussite army and the cathedral was burnt down. It lay in rubble for 279 years until 1700-1709 when restoration works were carried out by Jan Blažej Santini, who rebuilt cathedral in the baroque style. The reconstruction - an amazing hybrid of Baroque and Gothic style - was carried out with regard to preserve the original Gothic elements.