The province, which had been a part of Sweden from the 13th century, separated when Finland was ceded to the Russian Empire in 1809.
The provinces have no administrative function today but live on as a historical legacy in both countries.
Originally "Finland" referred only to this region but later replaced the traditional Österland ("Eastern land") in meaning.
Blazon: "Gules, a crowned jousting helmet in front of two lances in saltire, all Or.
On each lance is attached a forked hanging flag azure, charged with a Scandinavian cross Or."