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) called Top of Centre Square was located in Centre Square II. Located on the top floor, it was the highest restaurant in the city's history and closed in 1993. Centre Square (building) Centre Square is an office complex in Center City, Philadelphia, Pennsylvania, United States. The complex consists of two concrete high-rise towers: the Centre Square I (also known as Centre Square East) and the Centre Square II (Centre Square West)—respectively, the 24th- and 15th-tallest buildings in Philadelphia. Designed by Vincent Kling & Associates in the 1960s, Centre Square opened in 1973. The complex is credited with shifting Philadelphia's downtown