To help establish the power of the King of Sweden, three castles were built: the Turku Castle in Finland Proper, the Häme Castle in Tavastia and the Vyborg Castle in Karelia.
In mediaeval times the castles were important for the defence of Finland and they also acted as government centers in Finland.
The government area surrounding a castle was called a slottslän (linnalääni in Finnish).
Sweden was an electoral kingdom in mediaeval times and the election was held at the stones of Mora.
Finland also received the right to send their representative to the election in 1362, which shows the established role of Finland as part of Sweden.
The development of government and justice had a large role in the law established during the reign of king Magnus IV of Sweden.

In mediaeval times, the historical regions of Finland Proper and Satakunta were part of the central area of the Swedish government and retained the ties to Scandinavia they had formed already during prehistory.
In Southwest Finland, Tavastia, southern Karelia there was permanent agricultural population, which gradually condensed and spread to a larger area.
The spreading and establishment of the new population in Middle and North Ostrobothnia was one of the most notable events in the history of the Finnish population during the mediaeval ages.
In Åland, the Turku archipelago and the coastal regions of Ostrobothnia and Nylandia there also was a Swedish-speaking population.
In the mediaeval ages, peasants were by far the largest population group in Finland.
A large part of the area of current Finland was a wilderness in mediaeval times, where people from Satakunta, Tavastia and Karelia held hunting trips, and which was inhabited by Lapps, at least some of which spoke Sami.
The wilderness was not part of any government area in practical terms.

In the early times of the Swedish rule, official government documents were often written in Latin, which emphasised the role of the clergy also in secular government.
The use of old Swedish as a written government language increased during the 14th century.
In local governments in cities, particularly concerning international trade, the Middle Low German language was also largely used.
It is however impossible to present accurate approximations of the relations of different languages in mediaeval times.
To help establish the power of the King of Sweden, three castles were built: the Turku Castle in Finland Proper, the Häme Castle in Tavastia and the Vyborg Castle in Karelia. In mediaeval times the castles were important for the defence of Finland and they also acted as government centers in Finland. The government area surrounding a castle was called a slottslän (linnalääni in Finnish). Sweden was an electoral kingdom in mediaeval times and the election was held at the stones of Mora. Finland also received the right to send their representative to the election in 1362, which shows the established role of Finland as part of Sweden. The development of government and justice had a large role in the law established during the reign of king Magnus IV of Sweden.
In mediaeval times, the historical regions of Finland Proper and Satakunta were part of the central area of the Swedish government and retained the ties to Scandinavia they had formed already during prehistory. In Southwest Finland, Tavastia, southern Karelia there was permanent agricultural population, which gradually condensed and spread to a larger area. The spreading and establishment of the new population in Middle and North Ostrobothnia was one of the most notable events in the history of the Finnish population during the mediaeval ages. In Åland, the Turku archipelago and the coastal regions of Ostrobothnia and Nylandia there also was a Swedish-speaking population. In the mediaeval ages, peasants were by far the largest population group in Finland. A large part of the area of current Finland was a wilderness in mediaeval times, where people from Satakunta, Tavastia and Karelia held hunting trips, and which was inhabited by Lapps, at least some of which spoke Sami. The wilderness was not part of any government area in practical terms.
In the early times of the Swedish rule, official government documents were often written in Latin, which emphasised the role of the clergy also in secular government. The use of old Swedish as a written government language increased during the 14th century. In local governments in cities, particularly concerning international trade, the Middle Low German language was also largely used. It is however impossible to present accurate approximations of the relations of different languages in mediaeval times.
Finland under Swedish rule