La Princesse is a 15-metre (50-foot) mechanical spider designed and operated by French performance art company La Machine. The spider was showcased in Liverpool, England, as part of the 2008 European Capital of Culture celebrations, travelling around the city between 3-7 September. In 2009, it was on display in Yokohama, Japan, as part of Yokohama's 150th anniversary of its port opening.
On 3 September the spider appeared for the first time on the side of Concourse House, a derelict tower block in Lime Street, which had been designed by architect Richard Seifert and was scheduled for demolition. On the morning of 5 September, the spider moved to the Albert Dock, and it became active at lunchtime, moving in a small area and spraying the public with water. In the evening the spider travelled from the Albert Dock to the Cunard Building, via Salthouse Dock.
On 6 September the spider travelled through the streets of Liverpool, walking from the Cunard Building via Water Street, Castle St, Lord St, Parker St and Ranelagh Place back to Concourse House, passing many of Liverpool's iconic landmarks in the process. On 7 September, the spider went back to the Concourse House. A large crowd of spectators went to the Concourse House to see it as it proceeds to climb back down the building. The spider then crawls down the streets of Liverpool city centre, spraying the crowd with water. The spider then proceeds to make its way to the Queensway Tunnel. Watched by tens of thousands of people, it investigated the area outside the Queensway Tunnel's entrance, setting off huge water cannons and flames around the area, followed by hundreds of fireworks which detonated above the spider and the public. The spider backed into the tunnel's entrance, its last appearance in its "nest" city of Liverpool.
The spider was accompanied by musicians who played specially composed music by Dominique Malan, the special effects were designed by Thierry Loridant and the costumes were designed by Gaelle Choveau.