(r. 1041-1063)
Lambert II, also known as Balderic, assumed the title of count of Leuven following the death of his nephew Otto. A fierce defender of his prerogatives, he scorned both temporal and spiritual authorities, and, in 1051, he took up arms against Emperor Henry III, by whom he was defeated.
Brussels began its growth during his reign. Lambert II ordered construction of the church of Saint-Michel, to which, in 1047, he ordered the transfer by splendid procession of the remains of Saint Gudule. (The church was subsequently known as that of Saints-Michel-et-Gudule). He constructed the fortress on the Coudenberg hill and ordered the building of the first town wall. The first privileges granted to town residents date from his rule. In a document of September 1062 he is referred to as Lambert, count of Brussels.
Historical Dictionary of Brussels. Paul F. State.