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The Union of Horodło was signed there in 1413. It was a royal town of the Kingdom of Poland, administratively located in the Bełz Voivodeship in the Lesser Poland Province. During the late-18th-century Partitions of Poland, it was annexed by Austria. Following the Polish victory in the Austro-Polish War of 1809, it was regained by Poles and included within the short-lived Duchy of Warsaw, and after its dissolution in 1815, it passed to the Russian Partition of Poland. A large Polish patriotic demonstration took place here in 1861. After World War I, Poland regained independence and control of Horodło.