Fiefs that were held for a limited time.
* Denmark (Eric the Victorious, 991-995)
* Scania (Agreement of Helsingborg, 1332-1360)
* Blechingia (Agreement of Helsingborg, 1332-1360)
* Hven (Agreement of Helsingborg, 1332-1360)
* Elbing (Treaty of Altmark, 1629-1635)
* Braunsberg (Treaty of Altmark, 1629-1635)
* Pillau (Treaty of Altmark, 1629-1635)
* Fischhausen (Treaty of Altmark, 1629-1635)
* Lochstädt (Treaty of Altmark, 1629-1635)
* Memel (Treaty of Altmark, 1629-1635)
* Bremen (Recess of Stede, 1654-1666)
* Bornholm (Treaty of Roskilde, 1658-1660)
* Trøndelag (Treaty of Roskilde, 1658-1660)
* Cape Coast (Swedish Africa Company in Ghana, 1650-1663)
* Guadeloupe (Guadeloupe Fund, 1813-1814)
* New Sweden (New Sweden Company in Delaware, 1638-1655)
* Saint-Barthélemy (1785-1878)
Cities, held outside the realm, where Swedish mints were established.
* Stade (Saxony)
* Osnabrück (Saxony)
* Erfurt (Thuringia)
* Mainz (Palatinate)
* Würzburg (Bavaria)
* Fürth (Bavaria)
* Nuremberg (Bavaria)
* Augsburg (Bavaria)
* Elbing (Prussia, 1626-1635 and 1655-1660)
* Thorn (Prussia, 1655-1658)
Territories held under Martial Law
* Strassberg (conquest in the Polish War, held until 1629)
* Dirschau (conquest in the Polish War, held until 1629)
* Wormditt (conquest in the Polish War, held until 1629)
* Mehlsack (conquest in the Polish War, held until 1629)
* Frauenburg (conquest in the Polish War, held until 1629)
* Marienburg (conquest in the Polish War, held until 1629)
* Stuhm (conquest in the Polish War, held until 1629)
* Danziger Haupt (conquest in the Polish War, held until 1629)
* Landsberg (agreement with Brandenburg, 1641-1643)
* Frankfurt (agreement with Brandenburg, 1641-1643)
* Leipzig (agreement with Saxony, 1646-1648)
* Memmingen (agreement with Bavaria, 1647-1648)
* Überlingen (agreement with Bavaria, 1647-1648)
The Dominions of Sweden were territories that historically came under control of the Swedish Crown, but never became fully integrated with Sweden. This generally meant that they were ruled by Governors-General under the Swedish monarch, but within certain limits retained their own established political systems, essentially their diets.
Between 1561 and 1629 Sweden made conquests in the Eastern Baltic. All of them were lost in accordance with the Treaty of Nystad in 1721, which concluded the Great Northern War.
Estonia placed itself under Swedish rule in 1561 to receive protection from Russia and Poland as the Livonian Order lost their foothold in the Baltic provinces. Territorially it represented the northern part of present day Estonia.
Russia ceded Ingria and southern Karelia to Sweden in the Treaty of Stolbova in 1617, following the Ingrian War. A century later Russia reconquered the area, providing an opportunity for Peter the Great to lay the foundations of his new capital, Saint Petersburg, in 1703. The area was then formally ceded in 1721 by the Treaty of Nystad.
The Hanseatic town of Riga fell under Swedish control in the late 1620s. During its bare century in the Swedish Realm it was the second largest town after Stockholm.
Livonia was conquered from Poland by 1629 in the Polish War. By the Treaty of Oliva between Poland and Sweden in 1660 following the Northern Wars the Polish king renounced all claims to the Swedish throne and Livonia was formally ceded to Sweden. Livonia represents the southern part of present-day Estonia and the northern part of present-day Latvia.
By the Treaty of Brömsebro (1645), following the Torstenson War, Denmark ceded Jemtia, Herdalia, Gotlandia, Hallandia and Ösel to Sweden. Ösel and Dagö, islands off the coast of Estonia, were ceded to Russia in 1721 by the Treaty of Nystad. The other territories remained part of Sweden.
Through its minor German principalities, the Swedish kings in their roles as princes and dukes, or Reichsfürsten, of the Holy Roman Empire took part in the German diets from 1648 until the dissolution of the empire in 1806.
Bremen and Verden
In 1648 Sweden received the two bishoprics of Bremen-Verden in the Peace of Westphalia, following the Thirty Years' War. The town of Wildeshausen, which was situated as an exclave was also received. All of them were ceded to Hanover in the peace treaty of 1719.
By the Peace of Westphalia in 1648 Sweden received Pomerania, situated along the German Baltic Sea coast. In 1720 the Swedish part of Eastern Pomerania (Hinterpommern) with the town of Stettin and the islands of Usedom and Wollin were ceded to Kingdom of Prussia, following the Great Northern War. In 1814 Western Pomerania (Vorpommern), with the town of Stralsund and the island of Rügen were ceded to Denmark, which in exchange ceded Norway to the king of Sweden under the Treaty of Kiel, which followed on Second War against Napoleon. However the treaty of Kiel never came into force: instead sovereignty of Western Pomerania passed to Kingdom of Prussia, and Norway declared its independence, but was forced after a short war into a personal Union with Sweden.
Sweden received the German town of Wismar with the surrounding countryside in the Peace of Westphalia (1648). In 1803 Wismar was pawned, in exchange for a loan, and control was handed over to Mecklenburg. The loan defaulted in 1903, but Sweden rescinded its right to regain control of the German exclave and thereby nominally received its present territorial constitution.
Interesting articles at Wikipedia:
Rise of Sweden as a Great Power
Realm of Sweden
Dominions of Sweden