Albert Viljam Hagelin was a Norwegian

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 businessman and opera

Opera

Opera is an art form in which singers and musicians perform a dramatic work combining text and musical score, usually in a theatrical setting. Opera incorporates many of the elements of spoken theatre, such as acting, scenery, and costumes and sometimes includes dance...

 singer who became the Minister of Domestic Affairs in the Quisling regime

Quisling regime

The Quisling regime, or the Quisling government are common names used to refer to the collaborationist government led by Vidkun Quisling in occupied Norway during the Second World War. The official name of the regime from 1 February 1942 until its dissolution in May 1945 was Nasjonale regjering...

, the puppet government headed by Vidkun Quisling

Vidkun Quisling

Vidkun Abraham Lauritz Jonssøn Quisling was a Norwegian politician. On 9 April 1940, with the German invasion of Norway in progress, he seized power in a Nazi-backed coup d'etat that garnered him international infamy. From 1942 to 1945 he served as Minister-President, working with the occupying...

 during Germany

Nazi Germany

Nazi Germany , also known as the Third Reich , but officially called German Reich from 1933 to 1943 and Greater German Reich from 26 June 1943 onward, is the name commonly used to refer to the state of Germany from 1933 to 1945, when it was a totalitarian dictatorship ruled by...

's World War II occupation of Norway

Occupation of Norway by Nazi Germany

The occupation of Norway by Nazi Germany started with the German invasion of Norway on April 9, 1940, and ended on May 8, 1945, after the capitulation of German forces in Europe. Throughout this period, Norway was continuously occupied by the Wehrmacht...

.

A native of Bergen

Bergen

Bergen is the second largest city in Norway with a population of as of , . Bergen is the administrative centre of Hordaland county. Greater Bergen or Bergen Metropolitan Area as defined by Statistics Norway, has a population of as of , ....

, Hagelin was sentenced to death during the Norwegian post-war trials

Legal purge in Norway after World War II

When the occupation of Norway ended in May 1945, several thousand Norwegians and foreign citizens were tried and convicted for various acts that the occupying powers sanctioned...

, and put in front of a firing squad

Execution by firing squad

Execution by firing squad, sometimes called fusillading , is a method of capital punishment, particularly common in the military and in times of war.Execution by shooting is a fairly old practice...

 at Oslo

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...

's 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 :...

, where many of the 37 individuals condemned for treason and war crimes were executed.