(2017) Ai Weiwei created the sculpture "man in a cube" for the exhibition "Luther and the Avantgarde" in Wittenberg to mark the 2017 quincentenary of the Reformation. In it, the artist worked through his experiences of anxiety and isolation following his arrest by Chinese authorities: “My work is physically a concrete block, which contains within it a single figure in solitude. That figure is the likeness of myself during my eighty-one days under secret detention in 2011.” Concentrating on ideas and language helped Ai Weiwei endure his imprisonment. He was also intrigued by the connectedness of freedom, language and ideas in Martin Luther, to whom he explicitly paid tribute with man in a cube.