Flag of Germany
When Heinrich XI, Prince Reuss of Greiz was appointed by Joseph II, Holy Roman Emperor to rule the then-new Principality of Reuss-Greiz on 12 May 1778, the flag adopted by the "Fürstentum Reuß-Greiz" was the first-ever appearance of the black-red-gold tricolour in its modern arrangement in any sovereign state within what today comprises Germany – the Reuss elder line that ruled the principality used a flag whose proportions were close to a "nearly square"-shape 4:5 hoist/fly ratio, instead of the modern German flag's 3:5 figure.
Flag of Maastricht
In 1438 the flag of Maastricht is described as being as a five-pointed star on a red field, with the first historic image dating from 1545. The mentioned image was published in the "Wappenbuch von Meister IK"-book in Frankfurt am Main, Germany. However, in 1549, the flag is stated as being "yellow-white-red". In 1647, the white-star-on-red design had apparently returned when the Peace of Münster treaty was signed. The next known design is the white-red (with the upper part of the flag being white, and the lower part being red) design similar to the Polish flag. In 1993 it was decided by the municipal government to reinstate the first design and the flag was re-inaugurated on January 1, 1994.