140 St Georges Terrace is a 30-storey skyscraper in Perth, Western Australia. Opened in 1975, the 131-metre (430 ft) tower was known as the AMP Building or AMP Tower after its owner and former flagship tenant, AMP Limited. The building became the tallest completed skyscraper in Perth in 1975, a title which it held only until 1976, when Allendale Square was opened.

Allendale Square is a 32-storey skyscraper in Perth, Western Australia. When opened in 1976, the 132-metre (433 ft) building surpassed the AMP Building to become the tallest completed building in Perth, a title which it only held until 1977 when St Martins Tower opened.