How old is Stockholm? No one knows the exact date of the city's founding but the city is at least 760 years old. The first time the city is mentioned in historical records is 1252 A.D. in letters written by Birger Jarl and King Valdemar. Birger Jarl is traditionally considered to be the founder of Stockholm. There are many legends regarding why and how Stockholm came into existence... but the obvious reason is her strategic location on the border between Lake Mälaren and the Baltic Sea.
Tip: There is a good exhibition on Birger Jarl at the Museum of Medieval Stockholm going on until January 10th, 2011.