Eighteenth century France was in turmoil. Huguenots were persecuted and killed. Anyone professing that faith had to hide. The novel deals with various different denominations. The most important thing is not your denomination but that you serve God and live a godly life.
Faith is a major theme within the novel. Suzanne has her grandmother’s rosary. “Her rituals no longer soothed her.” Faith is not about rituals, it is about relationship with God. Faith is not something you can inherit from your parents. “You need your own faith. This you cannot borrow.” Faith is between you and God. You need to build your own relationship.