 The new building, while incorporating most of the constructional parts of the Hyde Park building, was so completely different in form as to be properly considered a quite different structure – a 'Beaux-arts' form in glass and metal.The main gallery was redesigned and covered with a new barrel-vaulted roof, the central transept was greatly enlarged and made even higher, and two new transepts were added at either end of the main gallery.It was modified and enlarged so much that it extended beyond the boundary of Penge Place, which was also the boundary between Surrey and Kent.