A huge tower
It was built between the thirteenth and fifteenth centuries, originally following the Romanesque style of the time, but later rebuilt as a Gothic piece. The huge tower is sure to catch your eye, standing almost 123 metres high, making it the tallest structure in the city, and interestingly, the second highest brick structure in the world, after New York's Chrysler Building. There are many important works here, including the mausoleums of Duchess Mary of Burgundy and Duke Charles the Bold, and Michelangelo's Madonna with Child.