Gong, Takis, 1978: ‘Within the Takis Foundation is an open-air theatre space featuring an ensemble of Takis’s works arranged around a central gong. This giant musical instrument is made from the rusted wall of an oil tank. In a shift in energy, this container of fossil fuel is now an instrument for producing meditative and resonant sounds. Inspired by Zen Buddhism, Takis’s work often relates to his contemplation of the individual’s connection with the universe. “In the greatest solitude I feel the greatest happiness,” he has said. Photo: Tate Modern, October 2019