The province is one of rich cultural heritage. The Tricity urban area, consisting of Gdańsk, Gdynia and Sopot, is one of the main cultural, commercial and educational centres of Poland. Gdańsk and Gdynia are two of the major Polish seaports, the first erected by Mieszko I of Poland in the Middle Ages, the latter built in the interwar period. Amongst the most recognisable landmarks of the region are the historic city centre of Gdańsk filled with Gothic, Renaissance and Baroque masterpieces, the Museum of the National Anthem in Będomin, located at the birthplace of Józef Wybicki, poet and politician, author of the national anthem of Poland, the largest medieval churches of Poland (the St. Mary's Church in Gdańsk and the Cathedral Basilica of the Assumption in Pelplin) and the Malbork Castle. The voivodeship also includes the narrow Hel Peninsula and the Polish half of the Vistula Spit. Other tourist destinations include Wejherowo, Sopot, Jurata, Łeba, Władysławowo, Puck, Krynica Morska, Ustka, Jastarnia, Kuźnica, Bytów and many fishing ports, lighthouses, and boats.