Unearthing of Montmartre sketch leads to authentication of second work

Works were exhibited at Palazzo Ducale in July when they were confiscated by the authorities

Bonhams returns £176,500 for piece attributed to Egyptian sculptor

New exhibition will look at artist’s early sculpture and include nude from show once shut down for indecency

The bust of Napoleon Bonaparte has been authenticated and is due to go on loan to the Philadelphia Museum of Art

The organisation commissioned to examine the works offered at the fair dropped out citing a lack of professionalism and “disrespect” of the experts’ mission

But the question remains if the work can still be considered authentic, after the artist allegedly disavowed it

As forgery cases pile up, auction house is also setting up a scientific research department

Catalogues raisonnés emerge as the latest front in the battle to authenticate works and secure market value

Judge's findings reveal what to look out for in art transactions

Authentication committee rejected 13 works owned by gallery clients, effectively rendering them “worthless”, according to court papers

Abstract Expressionism experts forced to watch what they write and say

Estate of Jackson Pollock’s mistress builds new case around forensic analysis

Tests suggests pigment used in some of the paintings not commercially available before artist’s death in 1956

Eric Fischl among the artists to support authentication system launched in London this week

The Lygia Clark foundation has temporarily stopped authenticating works by the artist

Legal conference tackles issues facing US museums, from commissioning work to developing diversity

Museum director and former antiquities minister refute Italian archaeologist’s theory