Kungstornen - Credit: Wikimedia Commons
Kungstornen (King's Towers) are twin tower skyscrapers, individually named Norra Kungstornet (Northern King's Tower) and Södra Kungstornet (Southern King's Tower), in Norrmalm, Stockholm. The 16-storey Norra Kungstornet is and was built between 1919 and 1924; and the taller 17-storey, Södra Kungstornet was built between 1924 and 1925. Together, they are considered the first modern skyscrapers in Europe. Read more on Wikipedia
Source: en.wikipedia.org