from the Warsaw, which had been destroyed by German forces during World War II. Reconstruction and removal of damages lasted until the 1950s. Contemporary history In December 1945, a match factory was launched in Olsztyn, as the city's first post-war industrial plant of national importance. A tyre factory was founded in Olsztyn in 1967. Its subsequent names included OZOS, Stomil and Michelin. City limits were greatly expanded in 1966 and 1987. In 1956, Olsztyn was the site of the largest Polish demonstration of support for the Hungarian Revolution of 1956. On the 500th anniversary of the birth of Nicolaus Copernicus, in 1973, a planetarium was opened in Olsztyn. In 1989 the former Gazeta Olsztyńska headquarters was rebuilt and re-opened as a museum. In 1991 Pope John Paul II visited the city. In 1999 the University of Warmia and Mazury in Olsztyn was established, which is now one of the largest universities in northeastern Poland. Olsztyn became the capital of the Warmian-Masurian Voivodeship in 1999. It was previously in the Olsztyn Voivodeship. Olsztyn Castle The Olsztyn Castle was built between 1346–1353 and by then it had one wing on the north-east side of the rectangular courtyard. Access to the castle leads from the drawbridge over the river Łyna, surrounded by a belt of defensive walls and a moat. The south-west wing of the castle was built in the 15th century, the tower situated in the west corner of the courtyard, from the middle of the 14th century, was rebuilt in the early 16th century and had a round shape on a square base and was 40 meters high. At the same time, the castle walls were raised to a height of 12 meters and a second belt of the lower walls was built. The castle walls were partly combined with city walls, which made the castle look like it had been a powerful bastion defending access to the city. The castle was owned by Warmia Chapter, which until 1454, together with the Prince-Bishopric of Warmia, was under the military protection of the Teutonic Knights and their Monastic State in Prussia. The castle had played a huge role in the Polish-Teutonic wars by then. After the Battle of Grunwald in 1410, the Poles took it after a few days siege. In the Thirteen Years' War (1454–66) it was jumping from rule to rule. The Knights threatened the castle and the town in