from 1970 onwards, the previous head offices were centralised in frankfurt am main, where the legal seat has also been located since 1990. in the early 1990s, commerzbank sought to build a new skyscraper in the center of frankfurt am main. the aim was to consolidate a large part of the rented locations in the city. the extraordinary skyscraper was designed by lord norman foster. since 1997, the tower has been a prominent feature of the frankfurt skyline and is regarded as a model for environmentally friendly and energy-saving architecture.