Union of Utrecht
The Union of Utrecht () was a treaty signed on 23 January 1579 in Utrecht, Netherlands, unifying the northern provinces of the Netherlands, until then under the control of Habsburg Spain. History 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. 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 two southern provinces and a city declared their support for Roman Catholic Spain. During the following months of 1579, other states signed the treaty as well, such as Ghent, cities from Friesland, as well as three of the quarters of Guelders (Nijmegen Quarter, Veluwe Quarter, Zutphen County). In the summer of 1579, 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 treaty. The city of Groningen shifted in favor under influence of