Sixteen years later the 1988 Bicentennial extension was built on the Domain parkland sloping steeply to the east. Within the constraints of two large Moreton Bay fig trees, and with a substantial part of the accommodation below ground level, the extension doubled the size of the gallery. Space for permanent collections and temporary exhibitions was expanded, a new Asian gallery, the Domain Theatre, a café overlooking Woolloomooloo Bay, and a rooftop sculpture garden were added.