One Canada Square was completed. It is expected to become the third tallest building in the United Kingdom in 2019 upon completion of 22 Bishopsgate. One Canada Square never achieved the title as tallest skyscraper in the European Union because in accordance to the CTBUH method, a building has to be "completed" before its receives its title, with Messeturm in Frankfurt being completed in 1990. On 15 November 1992, the Provisional Irish Republican Army attempted to place a large improvised explosive device near the tower. The IRA had already worked out that to cause maximum damage, the bomb had to be placed under
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