Dubok

Dubok was an old fortified place on the upper Don, south of the Ryazan heartland. It appears in accounts of Prince Sviatoslav Olgovich's travels in 1147 and in a later list of Ryazan towns. A source records its burning in 1378, during the turbulent struggle between the Ryazan lands and the Horde. In 1382 it was named among towns once held by the princes of Tarusa in an agreement between Moscow and Ryazan.