The Trial of Oldenbarnevelt, Grotius and Hogerbeets was the trial for treason of Johan van Oldenbarnevelt, Land's Advocate of Holland, Hugo Grotius, pensionary of Dordrecht, Rombout Hogerbeets, pensionary of Leiden, and their co-defendant Gilles van Ledenberg, secretary of the States of Utrecht by an ad hoc court of delegated judges of the States General of the Netherlands that was held between 29 August 1618 and 18 May 1619, and resulted in a death sentence for Oldenbarnevelt, and sentences of life in prison for Grotius and Hogerbeets. The trial was and is controversial for political and legal reasons: political, because it put the crown on the Coup d'etat of stadtholder Maurice, Prince of Orange and his partisans in the States General of the Dutch Republic that ended the previous Oldenba