The formal investigation follows his detainment earlier this week related to an ongoing spat with the art dealer Yves Bouvier

The mega-collector’s latest lawsuit, filed in New York, escalates his three-year legal feud with Swiss dealer Yves Bouvier

The work was bought by a Baton Rouge family for about $120 while travelling in London in 1958, the Wall Street Journal reports

The seller says that the painting, titled A Young Girl in Furs, was authenticated by the Stockholm art valuation firm Atelje Catellani

$450.3m Leonardo da Vinci painting was due to be unveiled at museum in two weeks but its display has now been delayed

The Art Newspaper invites Matthew Landrus to expand on his theory on attribution to Leonardo and studio

Did Louvre Abu Dhabi’s $450m painting belong to an English nobleman who followed Charles I to the scaffold in 1649?

The painting will be lent to the Louvre in Paris next year for an exhibition marking the 500th anniversary of artist's death

Dmitry Rybolovlev's $450m windfall from Salvator Mundi sale undermined fraud allegation, report says, but criminal cases against Bouvier in Europe are ongoing

The release of a pre-conservation image of Leonardo’s $450m Salvator Mundi reignites debate over the transparency of conservators’ interventions

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

Order could pave way for Russian billionaire to launch High Court case against Swiss dealer Yves Bouvier and Sotheby’s

We look back at some of most important purchases and donations that entered public collections this year

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

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

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