Pori is a city and municipality on the west coast of Finland. The city is located some 15 kilometres (9 mi) from the Gulf of Bothnia, on the estuary of the Kokemäenjokiriver, which is the largest in Finland. It was established in 1558 by John III. Pori is the most important town in the Satakunta region. Pori is known, among other things, for the sandy beaches of Yyteri and for hosting Pori Jazz, an annual international jazz festival. Performers at the jazz fesival have included Dizzy Gillespie,Herbie Hancock, Miles Davis, The Brand New Heavies and Steely Dan. B.B King is an honorary mayor of the city.