 He is one of the Protestant leaders who support the Prince of Orange against Spain (Catholic) who administers our region by inheritance from Charles V. In 1577, Eustache de Fiennes was even the leader of the Orange party in Saint - Omer, and in 1578 he participated in the Calvinist attempts to seize power in Arras.Unfortunately for him, this project is a failure and leads him, in 1585, before the Council of Disturbances, which condemned him to banishment and confiscation of his property, including the lordship of Annequin.He died in 1596, and his son Guislain sold the lordship ten years later, to Maximilien du Chastel.