At the same time that this suburban development was taking place, the most central areas of the inner city were being redesigned, known as ''Norrmalmsregleringen''. Sergels Torg, with its five high-rise office towers was created in the 1960s, followed by the total clearance of large areas to make room for new development projects. The most notable buildings from this period include the ensemble of the House of Culture, City Theatre and the Riksbank at Sergels Torg, designed by architect Peter Celsing.