Pechengsky District
On July 21, 1945, the Presidium of the Supreme Soviet of the Soviet Union decreed to establish Pechengsky District with the administrative center in Nikel on the territory of Petsamo ceded by Finland to the Soviet Union as part of the Moscow Armistice signed on September 19, 1944 and to include this district as a part of Murmansk Oblast. In 1947, Finland additionally sold the remaining Jäniskoski area with its hydroelectric plant, in exchange for Soviet confiscated German investments in Finland. Since then, with the exception of a minor transfer in 1987, the external borders of the oblast remained unchanged.