The organisation was disbanded in the early period of the Great Purge and many of its activists were murdered during the Latvian Operation of the NKVD.

[1][2][3] Prometejs was among the largest and most important educational organisations of ethnic minorities in the USSR.

[3][2][4] The organisation owned several factories producing stationery in Moscow in Leningrad, a printing house.

[1] Prometejs was banned and its members purged by the Soviet authorities in July 1937 despite attempts to protect the organisation by high-ranking Latvian Soviet officials like Jūlijs Daniševskis (chairman of Prometejs) and Roberts Eidemanis who were eventually themselves arrested and executed.

After initially being rejected by Moscow authorities, with the support of the Embassy of Latvia in Russia the plaque, created by Jānis Strupulis, was unveiled at Strastnoy Boulevard 8 on March 6, 2020 by Latvian ambassador Māris Riekstiņš and Moscow city officials.