The flag of the Republic of Kosovo was adopted by the Assembly of the Republic of Kosovo immediately following the unilateral declaration of independence of Kosovo on 17 February 2008. The flag design emerged from an international competition, organized by an informal group from the Provisional Institutions of Self-Government known as the Kosovo Unity Team, which attracted almost one thousand entries. Unlike the case of the autonomous province of Vojvodina, the Serbian authorities have not adopted a unique flag to represent this claimed province, using the flag of Serbia instead. Unofficially, the stars are sometimes said to represent the six regions, which according to Albanian ultra-nationalist ideology, make up Greater Albania: Albania, Kosovo, western parts of North Macedonia, parts of northern Greece, parts of Montenegro and Preševo Valley in southern Serbia. The stars vary in size and represent the different ethnic groups that reside in Kosovo.