Gdańsk has a very long history…Its over 1000 years old, and for most of it’s life has been a free city. It didn’t actually become a part of Poland until 1945. Being the largest seaport in the area, and not being a part of Poland is what brought about the development of Gdynia. In 1920, Poland no longer wanted to face the expense of having all the imports and exports going through a free city, so they built up Gdynia as a large seaport. We also went to the the site of the start of WWII. On September 1st, 1939, Gdańsk was attacked from the sea.