Along an old trading route lay a harbor, where the seed began to grow to what eventually became the city of Kalmar. The name Kalmar may be mentioned for the first time in the 9th century, when a runestone in Sörmland tells the story of a man in the “Kalmarna sundum” (“Kalmar Straight”). Kalmar, whose inlet is surrounded by rock, was considered a very dangerous passage for seafarers. Even today, at low tide, you can see the stone banks from the Öland bridge.
By the middle of the 13th century, Kalmar was one of the most important cities in the Nordic region, a flourishing trading city where traders were largely made up of wealthy Germans. Products from the Kalmar area were dispatched to the world. Stone from Öland, tar and wood from Småland, and iron, butter, leather and grain from surrounding areas. Imports included salt, beer, wine, malt and spices.
Kalmar was an important city of the Hanseatic League, a commercial and defensive confederation of merchant guilds and market towns in Northwestern and Central Europe. Other Hansa cities along the route were Novgorod, Riga, Visby, Falsterbo, Danzig, Lübeck, Hamburg, Cologne, Bruges and London. In other words, it can be concluded that Kalmar was part of an extensive trade exchange at an early stage. The German merchants dominated trade in the Kalmar area for several hundred years.
Kalmar diocese was founded in 1602. The Danes occupied the castle in 1611 and burned down the entire city. In yet another devastating fire in 1647, the rulers decide to move the entire city to a different location, Kvarnholmen. A ring wall is built around the city center. Kalmar County is formed in 1634. Kalmar Cathedral is completed in 1703.
The railway becomes part of Kalmar’s infrastructure, as the Kalmar-Alvesta-Växjö railway line is completed in 1874. Industrialization begins in the Kalmar area. The steam mill opens in the same year. After more than 300 years as an independent diocese, Kalmar becomes part of the diocese of Växjö from 1915.
The Öland Bridge is opened in 1972. In 2005, the regal ship Kronan is excavated. Kronan was lost in the battle of Öland in 1676, and the treasures found on board consisted of the largest collection of coins ever found in Sweden.
By the end of the 12th century, Knut Eriksson made a defense tower which became the foundation of Kalmar Castle. In the 1280’s, Magnus Ladulås gave orders to build another defense castle around the old castle. What was initially a single defense tower, became a larger defensive structure adjoined with Kalmar Castle.
Just over 100 years later, in 1397, Kalmar Castle is the center of one of the most important events in Scandinavia. The Kalmar Union is formed with Queen Margareta, ruling over Sweden, Norway and Denmark as well as associated areas such as Finland, Iceland, Greenland, the Faroe Islands, Orkney- and Shetland Islands. The union lasts between 1397-1523, but in 1483, the so-called Kalmar recess is held, a decision that for natural reasons was very unpopular among the nobility of the three countries.
The 16th century is a very dramatic century in Kalmar’s history. In both 1505 and 1599 Kalmar is exposed to bloodbaths; public executions of nobility ordered by the Danish king Kristian I.
In between, the successor to the Swedish throne (Gustav Vasa) succeeds in escaping from captivity and came to Stensö in Kalmar in 1520. Five years later, Kalmar is liberated by Swedish troops after many years of siege. It is also in the 16th century that Kalmar Castle is rebuilt into a Renaissance castle by Gustav Vasa and his sons. In 1587, the city statutes of Kalmar were signed by Johan III and Sigismund.