The name Brussels comes from 'Broekzele', a settlement (zele) near a swamp (broek). The flower that thrives in swampy areas is also the symbol of the city, namely the iris. This flower can be found on the flag of Brussels.Once, the river Zenne flowed here, with its many different islands. On one of the larger islands, Brussels originated. According to tradition, Charles, Duke of Lower Lorraine, built a castle here at the end of the 10th century. Around that time, people settled and ultimately created the city of Brussels. This Tour takes you around the special places of this city, which no longer resembles that settlement in the swamp. Have fun!