After the war between the powerful vampire noble families was over, the goddess who had now taken the responsibility to look after the whole continent seriously, told the queens to create fourteen grand temples in fourteen sacred locations. These temples would act as her medium to protect and look over the whole continent. So with them even if she was busy with her other duties, she would still be able to react in any unfortunate situation. And these temples would also act as the pillar of belief for all the vampires.
Those were just not any normal temples but each one of the temples had a theme attached to it. Taking inspiration from the culture of the devil society of Valhalla and the Angle society of Elysium, each of the temples were given the concept of one sin or one virtue. That was how the concept of grand vampiric temple of virtue and sin came to be.