For a work to be deaccessioned from the Tate is rare but permitted, in this case as a step toward upgrading the national collection

Loan of relic caught up in international political tensions

In an unusual move, Sotheby’s has categorised a picture as “infamous”

Crown that was returned in 1925 has disappeared

Exhibition aims to unravel the mysteries of the Hajj to non-Muslims

This development has done little to alleviate lingering tensions between Iran and Britain

Ruler angry over block on Coello masterpiece

If one of his works is not released by the UK authorities, an exhibition drawn from his collection will be pulled

Ashmolean bridges the cultural divide

The museum director has reassured Iran's vice president that the wait does not mean the loan has been called off

Rembrandt, Domenichino, Raphael and Van Dyck all on offer, but how many will remain in the UK?

After five years of research and conservation, Leonardo's masterpiece is once again looking its best

Director warns of security risks in the capital

Work attributed to 20th-century master forger Han van Meegeren may be 17th-century painting owned by Vermeer

The entire refurbishment project should conclude by 2020

The V&A’s guidebook used to describe the Fakes Gallery as one of its “most diverse, intriguing and entertaining” displays.

Last of rare Benin ivories in private hands is expected to go on the market

The story of the US Monuments Men

Members express concern about running of Trust

Unesco intergovernmental committee is now seeking “a mutually satisfactory resolution to the issue”

Fragile treasure, “Moctezuma’s Crown”, is subject of restitution claims

Exhibition space will occupy area originally designed for abandoned Spiral project

The request was rejected as a 'low priority', with concerns about 'deliverability'

The British Museum pledged to send over the rare cuneiform cylinder in exchange for Iran's ample contributions to previous shows

The 2010 exhibition may instead be shown at the Royal Academy

Otherwise the Wandworth house's unique fretwork decoration could be lost

Five iconic portraits may not be loaned to the exhibition due to legal anomaly

Farhad Hakimzadeh was given two years' imprisonment after it was learnt he had stolen volumes from the two UK institutions

Minister wants to reopen Baghdad Museum despite risks