Gemäldegalerie, Berlin

Sticky fingers: German climate activists strike museums four times in past week

Protestors from the Letzte Generation group have glued themselves to works by Rubens, Poussin and Cranach

First major Donatello exhibition in nearly 40 years to open in Florence

The Renaissance master is "more important than Giotto, Raphael or Caravaggio" say the curators of the show, which will travel to Berlin and London

Did the buyer of the Salvator Mundi get played—or did we?

What better way to boost its star power than by making it "disappear" for a few months?

Is this a Holbein? The market will decide at Maastricht next month

Tate director Sir Nicholas Serota says no, but the director of the Berlin Gemäldegalerie, among others, believes it is