Part of the New Portraits series, the work at the centre of the case was shown—and sold—at Frieze New York last year

Timothy Desmond’s Civil War painting was rejected by the Fresno County Fair

The ruling brings the value of the painting at the centre of the long-running case back to nil

In new court filings, Fabrizio Moretti reveals the work he says David Zwirner has failed to deliver—and is now seeking $6m in damages

A US court has dismissed a claim to recover two paintings looted by Nazis, but collector’s heir plans to appeal

The artist is being sued for $5m by a corrections officer who says he bought a work by Doig for $100 in the 1970s

In the first Paris court ruling, French “carnal artist” has been ordered to pay Lady Gaga and her record label €20,000

But he told reporters after the trial that he refused to pay and mocked the prosecutors’ charges of damaging cultural heritage by burning FSB doors

The artist is accused of using a London photographer’s image of the Sex Pistol’s bassist in an Instagram work

Court finds Elena Basner made a mistake, but prosecutors say they will appeal

Settlement collapses as discussions between Joseph Tierney, Moschino and creative director Jeremy Scott break down

Los Angeles agent and Dublin dealer Jonathan Ellis King sued artist for declaring jute sack works were not authentic

Nationalistic appropriation, brand control in reality TV shows, YouTube take-downs: American Law Institute’s annual course covered it all

Joseph Tierney had accused Italian fashion house and its creative director of using his work in clothing designs, including a dress worn by Katy Perry to Met gala

Leaked documents have sparked Geneva probe into $25m canvas stolen by Nazis

Decision by Supreme Court could have implications for other jurisdictions, legal experts say

In response to lawsuit filed because he would not authenticate 300-piece series, Ghanaian artist argues they “mutilated” his jute sack work and sold parts without authorisation

David Toren has filed a petition in New York State Supreme Court asking the Berlin auction house Villa Grisebach to reveal the buyers of works sold there

Agnès Saal’s taxi bills raised an outcry in France over spending by high-level civil servants

Museums may have difficulty matching steep price of remarkable work on paper

Decision puts to rest lengthy legal battle started by Pierre Konowaloff in 2008

Trial has revealed patterns of alleged thefts and relative impunity of union members

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

Arts Council insists export licence is required for relic of the martyred Maid<br>

Muhammad ibn al-Dheeb al-Ajami was given a 15-year sentence for reciting a poem in support of the Arab Spring on YouTube

Jewel sold in UK for £300,000 last month has left the country—but did it have an export licence?

Defence have made several arguments to cancel the prosecution, but the case continues this week

Federal Security Service is investigating several officials and businessmen over missing funds for state-sponsored heritage restoration projects