[1] On 24 March 1855, the Grand Duchy of Mecklenburg-Schwerin established its civil ensign, which consisted of three horizontal stripes of equal width: blue, white, and red.

On 22 October 1882, the blue and white were legally defined as the colours of the province, including the establishment of the flag.

It was divided horizontally into two equal stripes: light blue on top, and white on the bottom.

It was a rectangle divided horizontally into three equal stripes, that were, from top to bottom, dark blue, yellow, and red.

Such flag was hoisted in front of the Reichstag building in Berlin during the celebrations of the German Unity Day on 3 October 1990.

[1] In 1996, the historical regions of Mecklenburg, and Western Pomerania, had been given official status within the state of Mecklenburg-Vorpommern, Germany.

The flag of Western Pomerania consists of two horizontal stripes of the equal width: blue and white.

The flag of Mecklenburg consists of three horizontal stripes of the equal width: blue, yellow, and red.