Monza Cathedral, also known as the Cathedral of Saint John the Baptist, is a Roman Catholic church located in Monza, Italy. It was built in the 6th century and features a mix of architectural styles, including Romanesque and Gothic elements. The cathedral is famous for its stunning façade and beautiful interior, which includes intricate frescoes and a notable altar. The cathedral is also home to the Iron Crown of Lombardy, a historic relic believed to have been used to crown the kings of Italy. This crown is housed in a special chapel within the cathedral, making it a significant site for both religious and historical visitors.