The Federation Pavilion, designed by Alexander Tzannes, was erected around the ʻCommonwealth Stoneʼ as a permanent monument to Federation, in the Bicentennial Year of European Settlement in 1988. An inscription around the pavilion is from a poem by Bernard O'Dowd, and reads: "ʻMammon or millennial Edenʼ". The building was renovated and plaques were added to celebrate the Centenary of the Federation of Australia on 1 January 2001.