Which Australian city is named after the queen consort of King William IV of England?

Adelaide is the capital city of the state of South Australia, and the fifth-most populous city of Australia. In June 2017, Adelaide had an estimated resident population of 1,333,927. Adelaide is home to more than 75 percent of the South Australian population, making it the most centralised population of any state in Australia.

Named in honour of Adelaide of Saxe-Meiningen, queen consort to King William IV, the city was founded in 1836 as the planned capital for a freely-settled British province in Australia. Colonel William Light, one of Adelaide's founding fathers, designed the city and chose its location close to the River Torrens, in the area originally inhabited by the Kaurna people. Light's design set out Adelaide in a grid layout, interspaced by wide boulevards and large public squares, and entirely surrounded by parklands.

Early Adelaide was shaped by prosperity and wealth—until the Second World War, it was Australia's third-largest city and one of the few Australian cities without a convict history. It has been noted for early examples of religious freedom, a commitment to political progressivism and civil liberties. It has been known as the "City of Churches" since the mid-19th century, referring to its diversity of faiths rather than the piety of its denizens. The demonym "Adelaidean" is used in reference to the city and its residents.