The residence of the last kings of Poland, the Royal Castle in Warsaw located is at the entrance to the Old Town. This is a place of great historical events for Poland. It was here that on May 3, 1791, the second oldest state constitution was ratified. At the end of World War II the castle was completely destroyed by the Nazis. For many post-war years, the castle simply did not exist. Rebuilt from rubble, it is today one of the symbols of the independent Poland.