All seven vampire elder clans have their own sacred relics.
Except for the Thorn Clan's relic "Fallen Virtue," which is lost, all the other relics are in the hands of each clan's duke and hold particular significance for the vampires of each clan. For example, although the Grand Duke of Triss is the real leader of the Blood Vulture Clan, Murphy, who possesses the Necessary Evil, can still be seen as the duke's personal visit.
Over the past millennium, tales of the vampire relics have been an enduring "treasure topic" on the continent. Many boring individuals would debate which vampire relic was the weakest, because there is no dispute that the strongest is the Blood Covenant Relic, the Holy Spear of Eternal Silence, held by Lord Pa Ying.
That is a weapon that even the Bloodline Dukes feel like a thorn in their back.