Canberra is Australia's only inland capital city and the seat of its national government. The city celebrates its centenary in 2013. It is one of the major planned cities of the twentieth century and represents an exceptional open air museum of modernist planning, architecture, and landscape architecture ideas. It is the product less of one plan than of many plans, which have shaped its physical growth through distinctive phases of development. Canberra has grown from scratch to a planned suburban city of 330,000 with a diversified economy, major cultural institutions, and a high quality of life. While Canberra is still a place apart to many average Australians, the reality is an increasing convergence with other Australian cities in economic, social, and planning terms.