ORP Blyskawica is a Grom-class destroyer which served in the Polish Navy during World War II and is the only ship of the Polish Navy awarded the Virtuti Militari medal.
It is preserved as a museum ship in Gdynia, the oldest preserved destroyer in the world.

She was the second of two Grom-class destroyers, built for the Polish Navy by J. Samuel White, Cowes in 1935–37.
The name means Lightning. The two Groms were some of the most heavily armed and fastest destroyers on the seas during World War II.

http://www.wikiwand.com/en/ORP_B%C5%82yskawica

In the background - a tall ship "Dar Pomorza".