Melbourne has the highest number of businesses and residents in a small area in the municipality. The CBD is Melbourne's business and financial centre, home to retail, financial, legal, administrative, recreational, tourist and entertainment facilities, serving residents, workers and visitors. The CBD's population is one of the fastest growing small areas in Australia. Federation Square is Melbourne's major public square, hosting arts and cultural events, broadcasting major sporting events on a giant screen and is home to the Melbourne Visitor Centre, the Ian Potter Centre and the Australian Centre for the Moving Image. The area also features the Royal Botanic Gardens, Kings Domain (which contains Government House), Queen Victoria Gardens and Alexandra Gardens. The area includes Olympic Park and Melbourne Park, facilities that host a variety of sporting and entertainment events such as the Australian Open Tennis Championships.