The Imperial Image, a new play by Alvin Eng, is a dramatic triptych that explores how and why portraits of political leaders and royalty have come to hold a powerful place in societal structures and rituals. The triptych spans three different regions and eras. The play begins with a dialogue in Mughal era India, as Western-educated and influenced emperors and court painters contemplate how to communicate and relate to their largely illiterate populace. Part II is a monologue from Marie…