Henry's accession to the throne of France required his conversion to the Roman Catholic Church and Aubigné left his service to tend to his own Poitou estates, even though more moderate Huguenots welcomed King Henry's decree of religious toleration, the Edict of Nantes. However, d'Aubigné never entirely lost the favour of the King, who made him governor of Maillezais. d'Aubigné remained an uncompromising advocate of the Huguenot interests. The first two volumes of the work by which he is best known, his "Histoire universelle depuis 1550 jusqu'à l'an 1601", appeared in 1616 and 1618 respectively.