This cover from Poland features a block showing the Royal Castle in the Historic Centre of Warsaw
, the capital and main city in Poland. The Historic Centre of Warsaw is also inscribed at UNESCO as a World Heritage place. During the Warsaw Uprising in August 1944, more than 85% of Warsaw's historic centre was destroyed by Nazi troops. After the war, a five-year reconstruction campaign by its citizens resulted in a meticulous restoration of the Old Town, with its churches, palaces and market-place. It is an outstanding exemple of a near-total reconstruction.