Answer:

EMPERORS

AnswerCrossword Clue
EMPERORSOld Roman leaders
EMPERORSAkihito and Nero, e.g.
EMPERORSFollowers in the line of Augustus
EMPERORS"The ... New Clothes"
EMPERORSMaximilian and Charlemagne
EMPERORSHirohito, et al.
EMPERORSCrowned heads
EMPERORSAbsolute rulers
EMPERORSBig wheels
EMPERORSRulers of ancient Rome
EMPERORSRulers in Gibbon's "Decline and Fall."
EMPERORSRulers.
EMPERORSMonarchs
EMPERORSCharlemagne and Constantine
EMPERORSCaesar and Napoleon
EMPERORSConstantine and Hadrian
EMPERORSNero et al.
EMPERORSPower line?
EMPERORSMontezuma and others
EMPERORSSome moths and penguins
EMPERORSFranz Josef I and Haile Selassie
EMPERORSButterflies with crowned heads
EMPERORSMaximilian and Charlemagne, for two
EMPERORSTitus and Tiberius