Constitutional monarchy (de jure)[1]Autocracy (de facto)[2]Stratocracy (lateryears)[3]Sith empire[1]

Galactic Emperor Sheev Palpatine (19 BBY–4 ABY)[1][6]Grand Vizier Mas Amedda (4 ABY–5 ABY, proxy Emperor)[7]Grand Admiral Rae Sloane (5 ABY, public figurehead of the Empire)[7]Counselor to the Empire Gallius Rax (5 ABY, Emperor in effect)[7]

Imperial Senate (19 BBY–0 BBY, disbanded by the Emperor)[2]

Imperial City, Imperial Center (19 BBY–5 ABY)[5]

Imperial credits[2]

State Atheism (all religion outlawed)[9]New Order (political religion)[5][9]Sith (in secret, until 4 ABY)[1]

"Glory of the Empire"[11]

19 BBY[1][12]

4 ABY,[8][13] as the Imperial remnants[14](numerous independent nations, star systems, and factions)[15]

5 ABY, via Imperial Instruments of Surrender and Galactic Concordance[16][17][15][14]

5 ABY[16]

Sometime between 5 ABY and 21 ABY as the First Order[9]