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
Centre Square (building) works of contemporary art. Until the company left in the mid-1980s, Arco Chemical Co., whose headquarters was in Centre Square, had a large collection of contemporary art displayed throughout the complex. Philadelphia has a percent for art program, which requires that a percentage of construction costs be allocated for art. A fan and collector of contemporary art, developer Jack Wolgin had three pieces commissioned to fulfill the ordinance. The most famous piece is Claes Oldenburg's Cor-Ten and stainless steel sculpture, "Clothespin". Located atop the subway entrance in the plaza in front of the building, Centre Square is best known because