Mark Wallinger (born May 25, 1959) is a British artist. Having previously been nominated for the Turner Prize in 1995, he won in 2007 for his installation State Britain. His work Ecce Homo (1999-2000) was the first piece to occupy the empty fourth plinth in Trafalgar Square. He represented Britain at the Venice Biennale in 2001. Labyrinth (2013), a permanent commission for Art on the Underground was created to celebrate 150 years of the London Underground. In 2018, the permanent work Writ in Water was realized for the National Trust to celebrate Magna Carta at Runnymede, and The World Turned Upside Down was unveiled in 2019 for the London School of Economics.