Crowds at the 19th-storey Y flat ready for balloting at Toa Payoh estate in the 1960s. It was a highlight of Singapore's architecture, with an innovative take. It was known as the 'VIP block' due to the number of foreign and local dignitaries visiting this location. Famous guests include former Australian Prime Minister John Gorton, Queen Elizabeth II, Princess Anne and Prince Phillip of the United Kingdom, and former Sri Lankan Prime Minister Bandaranaike Sirimavo.