Complex sentence: In the 1990s, construction for the new home of the Council of the European Union built over the road, but the honorific remains: the EU headquarters now resides in the Justus Lipsius building.
Split into simpler sentences: In the 1990s, construction for the new home of the Council of the European Union built over the road. The honorific remains: the EU headquarters now resides in the Justus Lipsius building.