Gillis Valckenier became an orangist in 1670 and insulted Dirck Tulp and Lambert Reynst, resulting in many people losing their jobs.
In 1670 he became an orangist and supported the cancellation of the Perpetual Edict in July 1672. He had insulted Dirck Tulp and Lambert Reynst; in total sixteen members of the city council lost their seat, jobs on his advice, including Andries de Graeff. 
