Jørgen Christopher von Klenow was a Dano-Norwegian

Dano-Norwegian

Dano-Norwegian is a linguistic term for a koiné that evolved among the urban elite in Norwegian cities during the later years of the union between the Kingdoms of Denmark and Norway . It is from this koiné that Riksmål and Bokmål developed...

 military officer.

Jørgen von Klenow was born in Mecklenburg

Mecklenburg

Mecklenburg is a historical region in northern Germany comprising the western and larger part of the federal-state Mecklenburg-Vorpommern...

, (now Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

) and died in 1723 in Copenhagen

Copenhagen

Copenhagen is the capital and largest city of Denmark, with an urban population of 1,199,224 and a metropolitan population of 1,930,260 . With the completion of the transnational Øresund Bridge in 2000, Copenhagen has become the centre of the increasingly integrating Øresund Region...

, Denmark

Denmark

Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

. He was commandant

Commandant

Commandant is a senior title often given to the officer in charge of a large training establishment or academy. This usage is common in anglophone nations...

 of Akershus fortress

Akershus Fortress

Akershus Fortress or Akershus Castle is a medieval castle that was built to protect Oslo, the capital of Norway. It has also been used as a prison.- Construction :...

, Christiania

Oslo

Oslo is a municipality, as well as the capital and most populous city in Norway. As a municipality , it was established on 1 January 1838. Founded around 1048 by King Harald III of Norway, the city was largely destroyed by fire in 1624. The city was moved under the reign of Denmark–Norway's King...

, Norway from 1712 through 1719. This included the period in which Akershus successfully repelled the advance of King Charles XII of Sweden on Christiania and the siege of Akershus. During March 1716, Akershus fortress, was besieged by a Swedish force of 10,000 troops. Jørgen von Klenow managed to collect 3,000 defenders and endured a long siege, before the Swedes finally had to retire. Norwegian forces remained intact, and forced a retreat from the capital at 29 April after inflicting significant losses of men and material. Jørgen Christopher von Klenow then took command of Kastellet

Kastellet, Copenhagen

Kastellet, located in Copenhagen, Denmark is one of the best preserved fortifications in Northern Europe. It is constructed in the form of a pentagram with bastions at its corners...

—the fortifications of Copenhagen

Copenhagen

Copenhagen is the capital and largest city of Denmark, with an urban population of 1,199,224 and a metropolitan population of 1,930,260 . With the completion of the transnational Øresund Bridge in 2000, Copenhagen has become the centre of the increasingly integrating Øresund Region...

, Denmark

Denmark

Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...

from 1719 until his death in 1723.