The wiki says: 'Your character may have a secret religion due to: Secret conversion decisions You may spend piety to secretly convert to the religion of: A friend, spouse, or concubine A demesne county's population A demesne county's holy site Options in events You get an option to secretly convert: When a cultist tries to secretly induct you into their religion. Do heresies control the exact same holy sites as their parent religion? Im trying to become cathar for example. If you control a holy site you can right click on the holding and secretly convert. Home Discussions Workshop Market Broadcasts.
