Animated History of Sweden
Written sources about Sweden before 1000 AD are rare and short, usually written by outsiders, and not until the 14th century are there any longer historical texts produced in Sweden. Swedish history, in contrast with pre-history, is thus usually taken to start in the 11th century, when the sources are common enough that they are possible to be contrasted with each other.
The modern Swedish state was formed over a long period of unification and consolidation. Historians have set different standards for when it can be considered complete (resulting in dates from the 6th to 16th century), but a somewhat unified country, with power concentrated to one monarchical dynasty and some common laws were present from the second part of the second half of the 13th century. At this time, Sweden consisted of most of what is today the southern part of the country (except for Scania, Blekinge, Halland and Bohuslän), as well as parts of what is modern Finland. Over the following centuries, Swedish influence would expand into the North and East, even if borders were often ill-defined or nonexistent.