Pre-history
- 750–790: The trade centre Birka is established on Lake Mälaren (then part of the Baltic Sea) not far from Stockholm.
- c. 975: Birka is abandoned.
- c. 1000: Sigtuna emerges as the city dominating the Lake Mälaren region.
- 1247: Battle of Sparrsätra Birger Magnusson defeats the "true Folkungs".
- 1248: Birger becomes jarl.
- 1250: Birger initiates a "crusade" against the "tavasts".
- 1251: Battle of Herrevadsbro where Birger eliminates the "true Folkungs".
Read more about this topic: Timeline Of Stockholm History