Climate activists glued their hands to the frames of two world-famous paintings by Spanish master Francisco de Goya in Madrid's Prado museum on Saturday, the latest in a string of protests targeting artworks across Europe.
A man and a woman attached themselves to Goya's "La Maja Vestida" (The Clothed Maja) and his "La Maja Desnuda" (The Naked Maja), and painted "+1.5 C" on the wall between the two works, video footage showed.
Campaign group Futuro Vegetal said its members carried out the protest.
"Last week the UN recognized the impossibility of keeping us below the limit of 1.5 Celsius (set in the 2016 Paris climate agreement). We need change now," it wrote on Twitter.