Complex sentence: Goodhart-Rendel was a former president of the Royal Institute of British Architects, who was also responsible for a large office building (Princes House) in the centre of Brighton and for various similar buildings in London.
Split into simpler sentences: Goodhart-Rendel was a former president of the Royal Institute of British Architects. He also designed a large office building (Princes House) in the centre of Brighton and various similar buildings in London.