This is the symbol of The Camarilla with rare box, the largest of vampiric sects, a loose organization which ostensibly represents and protects all vampires by enforcing and promulgating the Masquerade. It is currently composed of six clans (formerly seven), though officially it considers all Kindred under its purview and welcomes any that obey its laws.
In addition to preventing the growing mortals masses from discovering the existence of vampires, the Camarilla aims to maintain the status quo of Kindred society; as such, much of its structure and traditions mirror that of Cainite society in feudal Europe in the Dark Ages, and places it at odds with the agenda of the Sabbat and Anarchs, both of whom seek to overthrow Kindred society.