Complex sentence: However, with the Commission refusing to share the Berlaymont with the Council of the European Union, it gave Charlemagne to the Council's secretariat in 1971 which had previously been located in the city centre.
Split into simpler sentences: However, with the Commission refusing to share the Berlaymont with the Council of the European Union, Charlemagne was given to the Council's secretariat in 1971. This had previously been located in the city centre.