 Melbourne City Centre, along with the adjacent Southbank area, has had comparatively unrestricted height limits in recent years, and has four of the six tallest buildings in Australia (or 5 of the top 10, excluding spires).The tallest in the CBD is currently Aurora Melbourne Central which topped out in December 2018.Melbourne had historically competed with Sydney for the tallest buildings, which until the 2000s were all office towers, and the three tallest buildings in Australia in the 1980s and 1990s were all in the Melbourne CBD.