it has undergone significant reconstruction in recent decades. Restoration of the Dresden Frauenkirche, a Lutheran church, the rebuilding of which was started after the reunification of Germany in 1994, was completed in 2005, a year before Dresden's 800th anniversary, notably by privately raised funds. The gold cross on the top of the church was funded officially by "the British people and the House of Windsor". The urban renewal process, which includes the reconstruction of the area around the Neumarkt square on which the Frauenkirche is situated, will continue for many decades, but public and government interest remains high, and there are numerous large projects underway—both historic reconstructions and modern plans—that will continue the city's recent architectural renaissance. 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. The completion of the reconstructed Dresden Frauenkirche in 2005 marked the first step in rebuilding the Neumarkt area. The areas around the square have been divided into 8 "quarters", with each being rebuilt as a separate project, the majority of buildings to be rebuilt either to the original structure or at least with a facade similar to the original. The quarters I, II, IV, V, VI and VIII have since been completed, with quarter III and quarter VII still partly under construction in 2020. In 2002, torrential rains caused the Elbe to flood above its normal height, i.e., even higher than the old record height from 1845, damaging many landmarks (see 2002 European floods). The destruction from this "millennium flood" is no longer visible, due to the speed of reconstruction. The United Nations' cultural organization UNESCO declared the Dresden Elbe Valley to be a World Heritage Site in 2004. After being placed on the list of endangered World Heritage Sites in 2006, the city