What is the catholic apostolic and roman faith to which the edict of nantes refers?

The Edict of Nantes was enacted in 1598 King Henry IV of France, in response to the social unrest generated by the religious division existent between the Catholics which were majority in the country and the Clavinist Protestant faction, also called the Huguenots. The main aim of the king was to preserve civil unity, and decided to grant certain rights to the Protestants.

The name Catholic Apostolic and Roman refers to the catholic doctrine, inside the Christian religion. This term remarks the catholic oposition to the protestant doctrine, including some aspects in which both differ, as Protestants do not believe in cult to saints (the main saints were Jesus' Apostles) and they do not recognize the authority of the Pope in Rome while Catholics do.