The belfry, at the centre of the Grand'Place, is a square sandstone tower 33 metres tall, topped by a 17-metre-tall bell chamber. The original building dates back to the 14th century, but only its base survived the bombardments of the First World War. Its reconstruction in the 1920s stayed faithful to the medieval style of architecture. The carillon, one of the most beautiful in the region, plays traditional melodies like "le p¡tit quinquin" each quarter hour. On the pinnacle stands a very famous windvane, Beffy the dragon, who has been watching over the city for more than 500 years. After sunset, the belfry lights up into a wonderful multicoloured mosaic.