The Imperial Muses are five powerful entities which protect the Empire: Torch, Throne, Shroud, Wheel and Rod.
Most citizens are religious and believe in the power of the Muses to intercede on their behalf. They frequently pray to the Muses for guidance and inspiration as befits their purview.
Paladins dedicate their lives entirely to the service of one particular Muse. The precise details of each initiation are unknown, but a Paladin swears a series of oaths, and aspires to embody the ideals of their chosen Muse as completely as possible - so, in turn, they may inspire others to great works.
The Orders pray to their Muses in their sanctums, conduct religious ceremonies, maintain law in the Boulevard, and undertake charitable works. Most citizens believe that the existence of Paladins is necessary for the spiritual health of Rastaban - that without enough people to embody the ideals of the Muses, Rastaban will collapse.
The current decline and corruption of the city is often associated with a lack of sufficient Paladins - or with a lack of sufficient Paladins of worth.
There is an old and bitter divide amongst the Paladins about whether it is acceptable to depict the Muses in the guise of people, rather than merely representing them as their sacred items.