New London show has received glowing reviews but there is one conspicuous absentee

Flaky winning bids are knocking the gloss off record-breaking sales

When I put an image of a well-known Titian on the screen, only one of 40 could identify the artist

$450m Salvator Mundi sale too late to be included in new book, The Orange Balloon Dog, but would have filled several chapters, economist says

Worcester Art Museum argues for reattribution of altarpiece panels by Verrocchio’s workshop

Russian brothers behind the replicas are planning a show of their Leonardo reproductions next year

Expect more guarantees, an Old Master revival and gallery innovation, says Georgina Adam, art market editor-at-large

We survey the top five results in key markets, from Old Masters to Post-war and contemporary

Better public understanding of condition requires greater access to digital images

Announcement appears to contradict earlier reports linking purchase to Saudi Arabia's Crown Prince

Recently identified buyer of Leonardo's Salvator Mundi is planning a pavilion at the Venice Biennale, art teaching in schools, international exhibitions, archaeology and virtual reality

Gesture consolidates close political alliance between Saudi Arabia and the UAE

News sent Twitter into a tizzy

Slick marketing produced stupendous sale price for Salvator Mundi, but it sparked revulsion as well as elation

Codex Leicester will go on show in Florence for the first time in almost four decades

Martin Gammon on the historical precedents of the $450m sale

Rumour mill has gone into overdrive over record-breaking auction

Thomas Campbell posted an image of the Salvator Mundi before conservation, triggering a row with its former co-owner Robert Simon and Christie’s Loic Gouzer

How the art sale of the century happened, with Judd Tully, our man in the salesroom. Plus, a new museum in Indonesia

Despite buy-ins, the sale saw several strong prices and records below the dizzy height of $450.3m for Leonardo da Vinci's Salvator Mundi

Price makes it the most expensive painting of all time

Painting is being presented by Christie’s as the “Holy Grail of Old Master paintings”

Pre-auction assessment offers evidence that painting is original Leonardo but also reveals problems posed by painting’s wooden panel

Salvator Mundi will break Old Master auction record as seller dispute rumbles on