Ai Weiwei’s cast iron tree joins Sculpture in the City 2025 Toast the City Ai Weiwei is among the artists featured in this year’s Sculpture in the City 2025 public art exhibition, which was officially unveiled yesterday. Nestled in the oasis of St Botolph without Bishopsgate churchyard (itself a contender for our Green Space of the Year award), his sculpture is a cast iron tree root moulded from endangered [...]