Dusseldorf's internationally best known trademark is the Königsallee (short: 'Kö'). Germany's most sophisticated mile is considered as one of the world's grand luxurious boulevards.
The "Kö", is the street to go shopping in Düsseldorf. Some of the most reputated jewelry shops, designer labels and galleries have their stores here, such as Cartier, Aigner, Lacoste, Eickhoff, Jil Sander, Benneton, Gucci, Esprit, Laurel, Armani, Chanel, Escada, Hugo Boss, Joop, Kookaï, Prada and many more.
The boulevard with its generous stretch of water down the center was commissioned from the court master builder Huschberger in the place of the existing fortifications, when the area was redeveloped in 1802.
The excavation of a moat of 31 m width and 5 m depth required the Düssel river to be diverted to provide the nececessary water. Two wooden bridges crossing the moat were provided with toll huts. On the suggestion of the landscape architect Weyhe, trees were planted alongside, and the boulevard was later on named Kastanienallee (Chestnut Avenue).
After the legendary incident when horse manure was thrown at King Friedrich Wilhelm IV. (1848), it was renamed Königsallee as a gesture of goodwill.