Imperial was a brand name used by the Chrysler Corporation from 1955 to 1975.  This prestige marque was intended to rival both Cadillac and Lincoln.  The name was revived between 1981 and 1983.  

1957 Imperial Crown Four Door Southampton. Model by NEO
1964 Imperial (The Green Hornet - "Black Beauty"). Model by Vitesse
1965 Imperial Crown Two Door Hardtop Coupe. Model by NEO
1971 Imperial Le Baron 4-door Sedan. Model by NEO
1975 Imperial Sedan. Model by NEO
1981 Imperial Coupe. Model by NEO