The project is being drawn up by HerzoganddeMeuron, the Swiss architects who transformed the former Bankside power station, which closed in 1981 and lay derelict for more than a decade until work began on creating Tate Modern, which opened in 2000.
Before going to Aix, Gelb stopped in Basel to meet with the Swiss architects Jacques Herzogand Pierre deMeuron, best known for their conversion of the Bankside power station, in London, into the Tate Modern.