The auction house has started proceedings in English High Court to recover its losses in the sale of a work that was deemed a forgery after technical testing

The three men involved in the heist face seven to ten years for the disappearance of five masterpieces

When he saw an object he liked, he would never let it go. Sometimes he waited years to acquire some of them

But professional burglar advises making sure you “have the resources” to pull off a similar heist “or drop the idea because it’s just too much of a headache”

Auction house sues seller while Frenchman at centre of saga denies painting is a modern copy

Together with his wife Monique Mueller, the Swiss collector built one of the largest private holdings of Pre-Columbian, African and Oceanic objects in Europe

Stash of 271 stolen works will be returned to the artist's family

The $100m initiative, inspired by the Global Fund to fight AIDS, will be presented at a conference in Abu Dhabi this week

The Second Protocol of the Hague Convention was met with strong resistance from Western military powers when it was adopted in 1999

Latest delay announced on eve of Abu Dhabi summit co-organised by France and the Emirate

Christoph Wiesner, the artistic director of Paris Photo, identifies new trends in collecting ahead of the fair’s 20th edition

Pierre Le Guennec changes his story claiming artist's wife gave him 271 works in rubbish bag

Sotheby's confirms painting shown at the Met attributed to Parmigianino now under suspicion

US collector refunded by Sotheby’s after tests reveal modern materials in “Frans Hals” painting &nbsp;<br> <br>

Sotheby's refunds buyer of Frans Hals once owned by Giulano Ruffini

Fakes scandals and threat of terrorism just some of the problems faced by the Paris art fair’s organisers

After Versailles, the Louvre is the latest institution caught up in forgery case involving Kraemer and Aaron galleries

French president François Hollande builds global coalition to protect cultural heritage

Collection remains vulnerable to rising waters until a planned superstore outside Paris opens in 2019

French collector Giulano Ruffini claims to have found and sold other paintings later attributed to Old Masters

The forger Shaun Greenhalgh’s boast that he made this chalk drawing may be fantasy, but claims that it is the work of Leonardo continue to be seen as equally dubious

Billionaire collector strikes deal with city’s mayor to convert historic stock exchange

Palazzo Grassi and Punta della Dogana have attracted more than 2 million visitors over the past decade, and Parisians may soon see more of the billionaire’s collection too

French novel about fictional master forger is being studied by French police for clues

After Malaga, Asia will be the next to get branded exhibition spaces

Old Master works by Orazio Gentileschi, Frans Hals and Diego Velázquez drawn into dispute