Introduction to the chapel: In 1743, Maria Theresa hired well-known artists at the time to make a simple but prestigious decoration for the royal chapel, which included marble high platform pilasters, a round roof, and a gilded sculpture of the Trinity. etc., there are altars of the Virgin Mary and St. John on the walls on both sides of the church, and the ceiling is painted with murals praising the Virgin. Originally dedicated to Our Lady, this church was renovated and became the venue for royal weddings.