This treaty formalized the reconciliation of Catholic southern provinces with Spanish rule, splitting the Low Countries and deepening the divide that led to Dutch independence.
Key Facts
- Treaty date
- 17 May 1579
- Spanish representative
- Alexander Farnese, Duke of Parma
- Signing parties
- Hainaut, Artois, Douai, Lille, Orchies, Arras
- Union behind treaty
- Union of Arras (formed 6 January 1579)
- Opposing union
- Union of Utrecht (formed 23 January 1579)
- Conflict context
- Eighty Years' War
By the Numbers
Location
Cause → Event → Consequence
During the Eighty Years' War, the largely Catholic southern provinces of the Spanish Netherlands grew increasingly uneasy with the direction of resistance led by Protestant-dominated provinces. In January 1579 they formed the Union of Arras, signaling willingness to negotiate a separate accommodation with the Spanish Crown and its governor, Alexander Farnese.
On 17 May 1579, representatives of the County of Hainaut, the County of Artois, and the cities of Douai, Lille, Orchies, and Arras concluded the Treaty of Arras with the Spanish Crown, represented by Alexander Farnese. The agreement formally ended hostilities between those provinces and Spain, restoring their submission to Spanish authority.
The treaty effectively split the Low Countries into two blocs: the reconciled southern provinces under Spanish rule, and the northern provinces of the Union of Utrecht, which continued the war and eventually declared independence as the Dutch Republic. This division broadly anticipated the modern boundary between Belgium and the Netherlands.
Political Outcome
The Union of Arras provinces formally reconciled with the Spanish Crown, ending their participation in the Eighty Years' War and affirming Spanish sovereignty over the Catholic southern Netherlands.
Southern provinces in a state of war with Spain during the Eighty Years' War
Southern provinces reconciled under Spanish rule; northern provinces continued resistance