Time Out says
Düsseldorf is one of the wealthiest cities in Germany, so it’s no surprise that luxury shopping is a favorite pastime here. The well-heeled flock to posh Königsallee (King’s Avenue), better known by its nickname, Kö, a nearly mile-long promenade brimming with high-end designer boutiques including Chanel, Louis Vuitton, Cartier and Ferragamo. For those with less-deep pockets, the southern end of the avenue is home to big chains like H&M, Zara and Massimo Dutti. Whatever your budget, the Kö is a lovely stretch to stroll, shaded by tall trees and flanked by a picturesque, bridge-laced canal. At its northernmost tip is the snazzy Kö-Bogen, a modern glassy retail and office complex designed by architect Daniel Libeskind. Opened in 2013, the mall’s biggest draw is the Apple Store, but it also houses several upscale German brands—Porsche Design, Hallhuber, Graf von Faber-Castell—plus the ritzy German department store Breuninger. Cafes line the Kö, with tables facing toward the shops, so settle in for a coffee while ogling the parade of fashionistas. Just be sure to get your shopping fix Monday to Saturday; stores are closed in Germany on Sundays.