context: The city of Pori was established in 1558 [7] north of the then city of Ulvila when the Ulvila harbor had become impassable for large ships due to land uplift. Pori was established on the then coast, but due to land uplift, the coast of the Bothnian Sea has dropped about ten kilometers from the city center. The seaside neighborhoods (Meri-Pori) are 20-30 km from the city center. Pori is still an important port city on the Finnish scale; Today the ports are located in Mäntyluoto and Tahkoluoto. In addition, Pori has an airport and a train station. The most important road links are highways 2, 8, 11 and 23. When Noormarkku and Lavia were connected to Pori [8], the city area expanded tens of kilometers inland.
question: When was Pori Established?
answers.text: 1558