I would say that it represents a rat king. The detail that the rats open or close the door makes it even more interesting.
If I were to see this door as a guest, I would wonder why this distinguished nobleman chose rats as decoration on the most representative door in his palace. Not swans, dragons, magnificent gardens or other elaborate decorations. If I knew that he was a vampire lord, then a similar question would arise, especially since vampires have such an exaggerated tendency to surround themselves with beautiful and magnificent things.
The style of the upper rooms is still more normal than the houses of other rich citizens. The architectural style of the basement always reminds me of marble elements in Italian villas from the 80s. The Shar Temple has a similar style. They all seemed to have the same architect.
