Thinning the painting’s varnish reveals La Belle Ferronnière's fine features, but French experts unable to confirm her identity

Unknown works appear with more familiar ones but a few key pieces have lost impact they once had in Breuer Building

Despite paying lip service to diversity, New York’s major museums, galleries and university programmes are bound tightly together in a system that favours the privileged

Adam Weinberg points out his highlights of the building and inaugural show

Unable to afford Manhattan’s astronomical rents, the small secular museum will close in June with its hit exhibition of Donatello sculptures on loan from the Duomo museum

Rich mix of Roman antiquities, contemporary art and a bar designed by Wes Anderson among treats in Rem Koolhaas-converted industrial complex

Abraham Cruzvillegas asks London’s parks to dig for art’s sake

Glenn Lowry stands by exhibitions that engage with popular culture and take some risks

Chris Dercon will stay in London until summer 2017 as extension approaches completion

Artist Ryan Gander among supporters of union protesting against museum’s plans to outsource visitor-facing and security jobs

America’s first purpose-built art gallery, located just across from the White House, has undergone a $30m renovation

Leading artists among the guests at preview parties at New York museum

The Renoir scholar comes to the museum after two years in San Francisco

Zaki Nusseibeh of the UAE endorses the role of institutions such as the British Museum during discussion with French cultural leader Jack Lang

Tobias Berger crosses bay to lead art programme in former Central Police Station

Super-sized, flexible spaces are the latest must-have, but curators and budgets can suffer

Funding squeeze causes museums and institutions around the country to postpone or cancel exhibitions

Country’s ministry of culture approves project to make underwater Byzantine basilica a tourist attraction

Major building project will transform the Moscow institution into a “Museum Town”

“Extraordinary contribution” praised as director sets sights on Mumbai and Berlin

<p> Performance artist’s Bauhaus-inspired venue was meant to open in 2013 </p>

Culture department says changes in data methodology stymie comparisons between latest figures and previous years<br>

Statute of limitations does not apply in Goudstikker heirs’ claim against Norton Simon Museum, ruling finds<br>

Joint project to place 31.5 million images on a single website would “revolutionise” art history, says Frick Collection’s Inge Reist