The Ardeatine massacre, or Fosse Ardeatine massacre (Italian: Eccidio delle Fosse Ardeatine), was a mass killing of 335 civilians and political prisoners carried out in Rome on 24 March 1944 by German occupation troops during the Second World War as a reprisal for the Via Rasella attack in central Rome against the SS Police Regiment Bozen the previous day.

Subsequently, the Ardeatine Caves site (Fosse Ardeatine) was declared a Memorial Cemetery and National Monument open daily to visitors. Every year, on the anniversary of the slaughter and in the presence of the senior officials of the Italian Republic, a solemn state commemoration is held at the monument in honour of the fallen. Each year, 335 names are called out, a simple roll call of the dead, to reinforce that 335 discrete individuals symbolise a collective entity.