Dresden remains a major cultural centre of historical memory, owing to the city's destruction in World War II. Each year on 13 February, the anniversary of the British and American fire-bombing raid that destroyed most of the city, tens of thousands of demonstrators gather to commemorate the event. Since reunification, the ceremony has taken on a more neutral and pacifist tone (after being used more politically during the Cold War). Beginning in 1999, right-wing Neo-Nazi white nationalist groups have organised demonstrations in Dresden that have been among the largest of their type in the post-war history of Germany. Each year around the anniversary of the city's destruction, people convene in the memory of those who died in the fire-bombing.