An unknown intruder has severely damaged the historic organ at Saint-Denis in Paris, Le Parisien reports. The two doors of the buffet have been broken and the organ’s engine was also damaged. The organ of the basilica is unique. Designed by the organ builder Cavaillé-Coll between 1834 and 1841, it is listed as historic monument. It is one of the first romantic organs. At the same time two glass windows have been broken. The policed has started an investigation.