The earliest settlement of what is now Brussels goes back to the year 580 and the island (Saint-Géry island) between two branches of the river Senne which ran through Brussels, on which Gaugericus (Géry), Christian bishop of Cambrai, built a chapel (Saint-Géry Chapel), which remained the oldest place of worship in the city until the building was demolished in the 1790s. (See also History of Brussels - part 2 ) Brussels is mentioned in the historical record again in 695. In the year 979, Lambert the Duke of Louvain, fortified the settlement on Saint-Géry Island - this is the traditional date of the founding of Brussels. What is now the Cathedral of Saints Michael and Gudula dates back to a parish church in 1047. In the 1100s, the Dukes of Brabant transformed the fortress on Saint-Géry Island into a inhabitable castle. The city was enclosed by the first city walls ( première enceinte - see shaded region on map to the right) in the 1200s. Brussels had developed into a subs...