ITALY
This was originally the flag of the Cisalpine Republic founded by Napoleon. It was influenced by the French tricolour and used from 1798 to 1802.
It was reintroduced in 1848 by the King of Sardinia, who added the coat of arms of the House of Savoy to the white band, and became the flag of the entire Kingdom of Italy in 1861. When the monarchy fell in 1946, the coat of arms was removed.