Adelaide Festival Centre, Australia's first multi-purpose arts centre and the home of South Australia's performing arts, was built in the 1970s, designed by Hassell Architects. The Festival Theatre opened in June 1973 with the rest of the centre following soon afterwards. The complex includes Festival Theatre, Dunstan Playhouse (formerly The Playhouse and Optima Playhouse), Space Theatre (formerly The Space) and several gallery and function spaces. Located approximately 50 metres (160 ft) north of the corner of North Terrace and King William Road, lying near the banks of the River Torrens and adjacent to Elder Park, it is distinguished by its two white geometric dome roofs, and lies on a 45-degree angle to the city's grid.