Gränna is a locality situated in Jönköping Municipality, Jönköping County, Sweden with 2,553 inhabitants in 2010. It is situated in Småland on the eastern shores of the lake Vättern, about 40 km north of Jönköping. Gränna has a population of 2,578 (2005) and was founded in 1652 by Count Per Brahe (...) (from Wikipedia)