Row over Leonardo da Vinci's Salvator Mundi erupts in the LRB

Dispute is over whether the painting was for sale before its display at the National Gallery A bitter row between art experts has erupted in the pages of the London Review of Books (LRB) over the Salvator Mundi, a previously unknown painting, that was first shown in the National Gallery’s Leonardo exhibition before going on to sell for a record $450.3m (£342.1m).The dispute centres on an unwritten rule that public collections should avoid showing pictures that are available for sale