What's the adjective for imperiality? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs imperialize and imperialise which may be used as adjectives within certain contexts.
“Monuments along the main streets of Ephesus show us how varied and imaginative these statues could be, whether as adjuncts to an imperial fountain or as architectural supports in a theatre.”
“In summary, Ming Tombs Reservoir has an image mixed with imperatorial mystery and revolutionary worship, combining natural scenery with human creation.”
“The 300 NGC certified coins in the auction include ancient specimens from the Roman Empire, the Roman Imperatorial, the Roman Republic, Ancient Greece and the Celtic region.”