One of Alexander Calder’s largest and most complex mobiles is to be shown outside Brazil for the first time this week after being restored by his grandson, Alexander Rower. Black Widow (around 1948) will be hung in its own space as the finale of the exhibition Alexander Calder: Performing Sculpture (11 November-3 April 2016) at Tate Modern in London—the largest show of Calder’s work ever held in the UK.

Rower, the head of the Calder Foundation in New York, is on a mission to restore as many sculptures as possible.