The Iron Crown of Lombardy is a historic crown that has been used in the coronation of various kings of Italy. It is made of gold and features a band of iron, which is believed to be a relic from the crucifixion of Jesus Christ. The crown is housed in the Cathedral of Monza near Milan and is an important symbol of the authority of the Italian monarchy. The crown dates back to the early Middle Ages and is associated with the Holy Roman Empire. It has been used in the coronation of notable rulers, including Charlemagne and the kings of the Lombards. The Iron Crown remains a significant artifact in Italian history and culture.