Fire Cult is an old belief which originated at Accia, an ancient city by the Inner Sea in Iscania. It worships the First Fire which born in the endless darkness after the birth of the world. It lit the sun that drove out the darkness and brought the world light. The followers called the sacred fire Lux, or Nightless, believing the moon and stars were the embers of resting sun. They fire the altars in the center of their settlements, towns, or cities due to the darkness returned trickily when the sun fell.
Fire Cult was once a common religion spreading in Iscania and any else in the lands which we called Quenan Imperium today. But thousands of years ago, at the beginning of the Tyrant's Match, as a punishment to the defenders of Accia, the Tyrant destroyed the Great Altar which was believed the first lighted Sacred Flame and killed almost all of the Flame Magisters. The fire cult nearly disappeared once, although a several surviving followers traveled to the Old Kingdom after the Tyrant's Fall. Hundreds of years later, after all of the Ironhands gone, King Offaar got the throne with his meager bloodline to former Royal House. He was one of the expanding Fire Cult followers when the old faith finally had gone away with the former dynasty. As his planning, a new capital was established that was named Dawn's Gate, and a new huge and ornate Altar was built in its center. The followers called it The Second Altar reverently, as they called the destroyed one The First Altar in the destructed Accia. Ten more decades later, the rebuilt Flame Sanctum got back to their origin finally. They rebuilt the Altar in Accia that was called The Renew Altar, and the ancient city was a part of the rising Quenan Imperium, though.
Nowadays the Fire Cult is a frequent faith in anywhere. It has a lot of followers who are nobles, commons, soldiers or any else, though the Great Assembly in the Old Kingdom(or, Silveria) and the government of Imperium both provide nothing to the Fire Cult Sanctums. Today, the fire cult has two centers in the world: the Flame Sanctum in Dawn's Gate and the Burning Sanctum in Accia. They Both treat each other brotherhood but object each other for the leadership. However, they neither have the influence to their own governments, especially the Church of Octo schemes to reduce the amount of the fire cult followers deliberately.