The Declaration "On the Restoration of Independence of the Republic of Latvia" (Latvian: Deklarācija par Latvijas Republikas neatkarības atjaunošanu) was adopted on 4 May 1990 by the Supreme Soviet of the Latvian SSR in which Latvia declared the re-instatement of its sovereignty and its independence from the Soviet Union. The Declaration stated that, although Latvia had de facto lost its independence in 1940, when it was annexed by the Soviet Union, the country had de jure remained a sovereign country as the annexation had been unconstitutional and against the will of the Latvian people.
It asserted the priority of the basics of the international law over the national laws and therefore it resolved that the Molotov–Ribbentrop Pact and the Soviet occupation of Latvia in 1940 were illegal.