The Cathedral of St. Michael and St. Gudula (French: Cathédrale Saints-Michel-et-Gudule; Dutch: Kathedraal van Sint-Michiel en Sint-Goedele), usually shortened to the Cathedral of St. Gudula or St. Gudula by locals, is a medieval Catholic cathedral in central Brussels, Belgium. It is dedicated to Saint Michael and Saint Gudula, the patron saints of the City of Brussels, and is a major example of Brabantine Gothic architecture.
The Romanesque church's construction began in the 11th century, replacing an earlier chapel, and was largely complete in its current Gothic form by the 16th, though its interior was frequently modified in the following centuries. The building includes late-Gothic and Baroque chapels, whilst its neo-Gothic decorative elements, including some of its stained glass windows in the aisles, date from restoration work in the 19th century. St. Gudula also stands out for its musical components, notably its two pipe organs and its immense church bells. The complex was designated a historic monument in 1936.