Explore details about location Boulevard du Souverain - Vorstlaan. Boulevard du Souverain - Vorstlaan is a location situated within the Auderghem - Oudergem alongside other areas such as Avenue des Argus - Argussenlaan, Carrefour Sainte-Anne - Sint-Anna Kruispunt, Clos des Pommiers Fleuris - Appelbloesemgaarde.