"Pe-al nostru steag e scris Unire" is a Romanian patriotic song dedicated to the United Principalities of Moldavia and Wallachia established in 1859. The text was written by Andrei Bârseanu and the music was composed by Ciprian Porumbescu in 1880. Its tune is now used in the Albanian national anthem. The anthem of the Dutch city of Maastricht bears considerable similarity to it, though it is unknown if Guus Olterdissen or his brother, Alfons, knew the tune.