Eighty years ago, in April 1937, Nazi German and Italian bombers attacked the ancient Basque city of Gernika. They destroyed three-quarters of it, killing and wounding hundreds.

The raid was "unparalleled in military history" according to reports at the time - and it inspired one of the most famous anti-war paintings in history: Guernica by Pablo Picasso.

Created for the Spanish contribution to the International Exposition of 1937 in Paris, the work is a poignant memorial to the suffering of the Spanish people during the Spanish Civil War.

We ask expert Rosario Peiró from the Reina Sofia Museum to interpret the great work.

Video produced by Natalia Pianzola