Palace of Culture and Science is the highest building in Poland in terms of overall height. It is located in the heart of Warsaw, on the Parade Square. The official opening of the building took place in 1955. It was designed by Lev Rudnev, an architect coming from the Soviet Union. Palace of Culture was a gift from "the Soviet people to the Polish nation" because it is designed on the model of high-rise buildings located in Moscow. It is an excellent example of architecture of socialist realism in Poland. By tourists visiting the Palace is possible only through companies that organize trips. Individuals can go to the observation deck, which is open daily from 9:00 to 18:00. Normal ticket costs 20 zlotys, and reduced 14 gold. Terrace is located at 114 meters high and can be enjoy the beautiful panorama of Warsaw. In addition to the outdoor terrace is a gallery inside, which are organized permanent exhibitions, as well as Gothic Hall. An interesting curiosity about the Palace is the fact that 25 cats were hired that were catching mice.