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History of the Low Countries
Austrasia				Frisian kingdom
Carolingian Empire ca 800–843
	Cty of Flanders 9th century – 1384	Lotharingia, then Lower Lorraine 855–954–977
Bishopric of Liège + Imperial Abbey of Stavelot- Malmedy + Duchy of Bouillon 10th century – 1795		Other feudal states	County of Luxembourg 963–1384	10th–14th centuries
	Burgundian Netherlands		Duchy of Luxembourg 1384–1443	1384–1482
	Habsburg Netherlands 1482–1795 (Seventeen Provinces, Burgundian Circle)
	Spanish (Southern) Netherlands 1549–1713
				Dutch Republic 1581–1795
	Austrian Netherlands 1713–95
Liège Revolution 1789-1792	United States of Belgium 1790
French Republic 1795–1804				Batavian Republic 1795–1806
French Empire 1804–15
				Kingdom of Holland 1806–10
United Kingdom of the Netherlands since 1815
Kingdom of Belgium since 1830			Grand Duchy of Luxembourg since 1839	Netherlands

The Union of Utrecht (Dutch: Unie van Utrecht) was a treaty signed on 23 January 1579 in Utrecht, the Netherlands, unifying the northern provinces of the Netherlands, until then under the control of Habsburg Spain.

The Union of Utrecht is regarded as the foundation of the Republic of the Seven United Provinces, which was not recognized by the Spanish Empire until the Twelve Years' Truce in 1609^[1].

The treaty was signed on 23 January by Holland, Zeeland, Utrecht (but not all of Utrecht) and the province (but not the city) of Groningen. The treaty was a reaction of the Protestant provinces to the 1579 Union of Arras (Dutch: Unie van Atrecht), in which the southern provinces declared their support for Roman Catholic Spain.

On February 4 Ghent also signed. In March some cities from Friesland joined it, as well as 3 of the 4 quarters of Guelders. In the summer, Amersfoort from the province of Utrecht also joined, together with Ypres, Antwerp, Breda and Brussels. In February 1580, Lier, Bruges and the surrounding area also signed the Union. The city of Groningen shifted in favor under influence of the stadtholder for Friesland, George van Rennenberg, and also signed the treaty. Later on, Zutphen also signed so Guelders (of which Zutphen is one of the quarters) supported the Union completely. This happened in April 1580, as did the signing of Overijssel and Drenthe.

Map of the Spanish Netherlands, the Union of Utrecht and the Union of Arras (1579).

This leads to a general and simplified overview of the parts that joined:

• the County of Holland
• the County of Zeeland
• the Bishopric of Utrecht
• the Duchy of Guelders
• the lordship of Groningen
• the lordship of Friesland
• Drenthe
• the lordship of Overijssel
• the Duchy of Brabant
• the County of Flanders
• the cities of Tournai and Valenciennes

Flanders was almost entirely conquered by the Spanish troops, as was half of Brabant. The United Provinces still recognized Spanish rule after the Union of Utrecht. However, the Union contributed to the deterioration in the relationship between the provinces and their lord, and in 1581 the United Provinces declared their independence of the king in the Act of Abjuration.

See also

• List of treaties

References