The Walker Art Center in Minneapolis (2005), was designed by the Swiss architects Herzog and de Meuron, who designed the Tate Modern museum in London, and who won the Pritzker Architecture Prize, the most prestigious award in architecture, in 2001. It updates and provides a contrast to the austere earlier Modernist structure designed by Edward Larrabee Barnes by adding a five-story tower clad in panels of delicately sculpted gray aluminum, which change color with the changing light, connecting by a wide glass gallery leading to the older building. It also harmonizes with two stone churches opposite.