William the Silent (24 April 153310 July 1584), also known as William the Taciturn (translated from ), or, more commonly in the Netherlands, William of Orange (), was the main leader of the Dutch revolt against the Spanish Habsburgs that set off the Eighty Years' War (1568–1648) and resulted in the formal independence of the United Provinces in 1648. Born into the House of Nassau, he became Prince of Orange in 1544 and is thereby the founder of the Orange-Nassau branch and the ancestor of the monarchy of the Netherlands. In the Netherlands, he is also known as Father of the Fatherland (Pater Patriae) (). A wealthy nobleman, William originally served the Habsburgs as a member of the court of Margaret of Parma, governor of the Spanish Netherlands. Unhappy with the centralisation of political power away from the local estates and with the Spanish persecution of Dutch Protestants, William joined the Dutch uprising and turned against his former masters. The most influential and politically capable of the rebels, he led the Dutch to several successes in the fight against the Spanish. Declared an outlaw by the Spanish king in 1580, he was assassinated by Balthasar Gérard in Delft in 1584. Early life and education William was born on 24 April 1533 at Dillenburg Castle in the County of Nassau-Dillenburg, in the Holy Roman Empire (now in Hesse, German Federal Republic). He was the eldest son of Count William I of Nassau-Siegen and Juliana of Stolberg. William's father had one surviving daughter by his previous marriage, and his mother had four surviving children by her previous marriage. His parents had twelve children together, of whom William was the eldest; he had four younger brothers and seven younger sisters. The family was religiously devout and William was raised a Lutheran. In 1544, William's agnatic first cousin, René of Châlon, Prince of Orange, died in the siege of St Dizier, childless. In his testament, René of Chalon named William the heir to all his estates and titles, including that of Prince of Orange, on the condition that he receive a Roman Catholic education. William's father acquiesced to this condition on behalf of his 11-year-old son, and this was the founding of the House of Orange-Nassau. Besides the Principality of Orange (located today in France) and significant lands in Germany, William also inherited vast estates in the Low Countries (present-day Netherlands and Belgium) from