A tale of two cities
- An industrial city with a buzzing nightlife, it is the largest city in west-central Poland.
- The area was ceded from Germany in the Treaty of Versailles in 1919.
- Local team Lech Poznan were 2010 champions.
- Their fans started the famous dance whereby fans turn their backs on the pitch, put their arms on each others' shoulders and jump up and down.
- Famous locals include mathematicians Marian Rejewski and Henryk Zygalski, who cracked the Enigma code in World War Two.
- Napoleon said the city was "key to everything" and this important port city on the Baltic Sea has regularly changed hands over the past 1,000 years.
- Formerly known as Danzig, it was a city state with its own flag, constitution, national anthem and currency until 1945.
- It was the home of the Solidarity movement which was headed by Lech Walesa in the city's shipyards.
- It has traditionally been on the margins of the Polish football scene. Local side Lechia Gdansk rarely threaten for honours.