A critical look at old and new conservation and preservation techniques

Three works by the German master went on show last month following an acid attack a decade ago. Two have been restored with a new ion-exchange technique used on paintings for the first time

The find dates from around AD 650

Negotiating the restitution of religious art is important, but it should not be at the expense of the institutions protecting Russia's cultural heritage

The structure that replaced the wooden support has caused the 13th century Madonna to rupture

Professor James Beck of Columbia University is standing trial in Italy