One Canada Square of London."" One Canada Square was originally designed to be high at 55 storeys, but that penetrated the permitted projection height of the flight obstruction area of the airport approach district to London City Airport, but this was extended to a height of above kerb level in consideration of the fact that One Canada Square was on the external zone of the airport approach. To comply with air traffic safety regulations, the architects took five floors off the tower. The final height of was permitted, otherwise, the developers would have had to dismantle what was necessary to fit the height
London Guarantee Building Beaux Arts tower. From the 1960s through the 1980s, the studios of Chicago's WLS (AM) radio were located on the fifth floor of the building. For several decades, Paul Harvey performed his daily syndicated radio show from studios on the fourth floor. The building was also famous from the 1950s through the early 1970s for The London House, a famous Chicago jazz nightclub and steakhouse that was located on the west side of the building's first floor; it had its own entrance on Wacker Drive. It was one of the foremost jazz clubs in the country, once home to such