The Heidi Horten Collection in Vienna includes works by Andy Warhol, Lucio Fontana and Damien Hirst

With loan shows bringing together dozens of works with diverse conservation histories, curators can face myriad hurdles in their quest for cohesion

Commissioned work—currently on view in a public garden in Valetta—will move to the Malta International Contemporary Art Space sculpture garden after it opens in 2023

Precision illumination can draw out a work’s fine details without physical intervention, but some doubt it will ever replace traditional conservation