Complex sentence: Early building in Brussels was sporadic and uncontrolled with little planning, the current major buildings are the Berlaymont building of the Commission, symbolic of the quarter as a whole, the Justus Lipsius building of the Council and the Espace Léopold of Parliament.
Split into simpler sentences: Early building in Brussels was sporadic and uncontrolled with little planning. The current major buildings are the Berlaymont building of the Commission, symbolic of the quarter as a whole, the Justus Lipsius building of the Council and the Espace Léopold of Parliament.