Dominik Semashko (Belarusian: ??????? ???????; 16 August 1878 – 27 November 1932) was a Belarusian activist.
In 1890s, he joined the Polish Socialist Party and other socialist groups advocating workers' rights.
The police forced him to flee to Switzerland where he received engineering education and firefighting training.
During World War I, he was fire chief in Vilnius from 1915 to 1918.
In 1918, he was elected to the Rada of the Belarusian Democratic Republic and co-opted to the Council of Lithuania.
Initially, he was a supported of a union between Lithuania and Belarus along the lines of the old Grand Duchy of Lithuania but later shifted to more fully support Lithuania.
He represented Lithuania at the Paris Peace Conference and during the negotiations of the Soviet–Lithuanian Peace Treaty.
In 1920–1922, he was Minister for Belarusian Affairs.
He then retired from politics and devoted his time to firefighting.
Author: Adomas Kliucinskis, uploaded by Rimantas Lazdynas Source: Lietuvos albumas. Janina Markevicaite, Liudas Gira, Adomas Kliucinskis – Kaunas / Otto Elsner, Berlin, 1921 m. License: CC-PD-Mark PD Old