The Royal Exhibition Building is in Carlton, Victoria, Australia. When it was built in 1880, it was the largest building in Australia and the tallest building in Melbourne. It is listed as a World Heritage site. It is the only 19th century exhibition hall that held an international exhibition still in use. In 1880, 1.8 million people visited the exhibition; the population of Melbourne was only 282,000 people. From 1901 to 1925 the state government of Victoria used the building while the federal government used the State Parliament buildings.