DAUGAVPILS (Dvinsk), a town of Latvia in 53' N., 26° 32' E. on the Daugava (Western Dwina). Pop. (1926) 40,64o. Formerly a Russian fortress, it is now the training centre for the Lettish army, and has some timber industries. The Livonian Knights of the Sword founded a fort 12 m. further up the river, which was removed to its present site by Stephen Bathori, King of Poland, in 1582. Poland, Sweden and Russia alternately occu pied this strategic border fort until the partition of Poland gave it to Russia in 1772. The French occupied it in 1812 and it was a centre of strife in 1914-18, its population and industry being much diminished as a result.