Artists spent centuries making art about light – the divine rays of the ... years has seen his work reappraised. Now he’s at Tate Modern, taking over the galleries that until recently were ...

Thankfully, his fully functional pissoir (Étude de couleur, 1991) did come to be, though not installed on Tate Modern’s roof as he’d once hoped. If I wanted to make a readymade today, I would make a ...