The Colonies of Tegryon
The ruling council of Krakmanor it consisted of 7 Great Wyrms. As far as modern historians are able to determine the dragons that occupied the seats on the Conclave changed over time and the positions were not for life. Perhaps they changed due to infighting. At least one was destroyed in the First Rising.
According to legends told among the Dragonborn the primary duty of the Conclave was to maintain something known as the Balance. A dualistic ideal representing the tension between their gods Bahamut and Tiamat
Prior to Skyfall three members of the Conclave perished in an event that continues to perplex scholars the time to this day.