Gdansk is a port city located in Poland. It is the largest city in the Pomeranian region and is situated on the Baltic Sea coast. Gdansk is one of the oldest cities in Poland, having been founded in the 10th century. It is an important seaport and has been a major trading hub since the Middle Ages. Gdansk is also known for its historical monuments, including the medieval Long Market and the 15th-century St. Mary's Church.