The Adelaide Festival Centre, Australia's first multi-purpose arts centre, was built in 1973 and opened three months before the Sydney Opera House. The Festival Centre is located approximately 50 metres north of the corner of North Terrace and King William Street, lying near the banks of the River Torrens and adjacent to Elder Park. It is distinguished by its three white geometric dome roofs and its plaza consisting of lego block-like structures to the south and lies on a 45-degree angle to the city's grid.