Flag of the city of Daugavpils.
This file was derived from:

 Flag of Daugavpils.png: 
Coat of arms of Daugavpils.svg: https://www.daugavpils.lv/pilseta/par-daugavpili/simboli
Daugavpils City Council

File:Coat of arms of Daugavpils.svg vectorized by McSush
Derivative work (this file) created by Patrick87