Tournai Cathedral, also known as the Cathedral of Our Lady, is a Roman Catholic cathedral located in Tournai, Belgium. It is considered one of the finest examples of Romanesque architecture in Europe and was designated a UNESCO World Heritage Site in 2000.

Construction of the cathedral began in the 12th century and continued over the next few centuries, with various additions and modifications made to the original design. The cathedral features a distinctive five-towered facade, with two towers on either side of the main entrance and a central tower that rises to a height of 83 meters (272 feet).

The interior of the cathedral is equally impressive, with a large nave and numerous chapels decorated with stained glass windows, sculptures, and other works of art. One of the most notable features of the interior is the high altar, which dates back to the 14th century and is considered one of the finest examples of Gothic art in Belgium.

Tournai Cathedral also houses a number of important religious relics, including the Holy Shroud, a cloth believed to have been used to wrap the body of Jesus Christ after his crucifixion.