The flag that is used as the symbol of Kashubia, a region in Central Europe, and the Kashubian people, is divided horizontally into black and yellow stripes.

The most common version of the flag of Kashubia is divided horizontally into two equally-sized stripes that are black on top and yellow on the bottom.

[2] The other version is a banner of arms, based on the coat of arms of Kashubia, that depicts a black griffin standing on its back paws, wearing a yellow crown, placed in the centre of the yellow background.

[3] The first recorded use of the flag dates back to 18 August 1929 during a Kashubian convention in Kartuzy.

He also mentions that Aleksander Majkowski owned such flag before the convention happened.