The Siege of Deventer was a siege of Deventer

Deventer

Deventer is a municipality and city in the Salland region of the Dutch province of Overijssel. Deventer is largely situated on the east bank of the river IJssel, but also has a small part of its territory on the west bank. In 2005 the municipality of Bathmen Deventer is a municipality and city in...

 (then a major Hanseatic

Hanseatic League

The Hanseatic League was an economic alliance of trading cities and their merchant guilds that dominated trade along the coast of Northern Europe...

 city) in 1456 during a struggle between Duke Philip the Good of Burgundy and the church, the nobility and cities of the Oversticht (Overijssel

Overijssel

Overijssel is a province of the Netherlands in the central eastern part of the country. The region has a NUTS classification of NL21. The province's name means "Lands across river IJssel". The capital city of Overijssel is Zwolle and the largest city is Enschede...

).

Over the 15th century the Dukes of Burgundy became more and more influential in the Netherlands, striving for a stronger and more centralised grip on the country. In 1456 Duke Philip the Good made his illegitimate son David of Burgundy

David of Burgundy

David of Burgundy was a bishop of Utrecht. The illegitimate son of Philip the Good, Duke of Burgundy, he was made bishop of Utrecht by his father from 1456 to 1496 in an attempt to enforce more centralised Burgundian control over the Netherlands. He also served as bishop of Thérouanne from 1451 to...

 to be the successor of Rudolf van Diepholt

Rudolf van Diepholt

Rudolf van Diepholt was a bishop of Utrecht from 1423 to 1455 and bishop of Osnabrück from 1454 to 1455.Rudolf van Diepholt was one of the most influential Prince-Bishops of Utrecht in the late Middle Ages...

 as bishop of Utrecht. Overijssel's cities and nobility resented a Burgundian overlord and planned not to recognise Philip's choice, with the chapters of the Sticht Utrecht favouring another candidate, Gijsbrecht of Brederode. Philip thus took up arms and besieged Deventer for 5 weeks to make it accept his decision, which it finally did, accepting David as Deventer's temporal and spiritual overlord.