Accord of Osterhusen
The Accord of Osterhusen was an agreement signed by Enno III of East Frisia on 21 May 1611 in Osterhusen with the mediation of the Dutch States General with the revolting East Frisian estates of the County of East Frisia. The Accord of Osterhusen once again confirmed previous state treaties and established the sovereignty of the East Frisian estates in legislation, tax collection and jurisdiction. Its provisions regulated the relationship between the count and the estates (and in particular the city of Emden).