Caligula - Augustus of Imperium Romanum from 37 to 41
Gaius Julius Caesar Augustus Germanicus was Roman emperor from AD 37–41.

Caligula's biological father was Germanicus, and he was the great-nephew and adopted son of Emperor Tiberius. He earned the nickname "Caligula" from his father's soldiers while accompanying him during his campaigns in Germania.

He is described as a noble and moderate ruler during the first six months of his reign. After this, the sources focus upon his cruelty, sadism, extravagance, and sexual perversity, presenting him as an insane tyrant.

In early AD 41, Caligula was assassinated as a result of a conspiracy by officers of the Praetorian Guard, senators, and courtiers.
Caligula
Emperor Caligula "Little Soldier's Boot" of the Roman Empire

Epithet: Caligula ("Little Soldier's Boot")

(1) Caligula 37-38 AD
Obverse: C CAESAR AVG GERMANICVS PON M TR POT, bare head left
Reverse: VESTA, Vesta enthroned left, patera extended in right, long scepter transverse in left, S - C flanking across field
Ref: RIC I 38, Cohen I 27, BMCRE I 46, S...
(2) Caligula AD 37-38
Obverse: C CAESAR AVG GERMANICVS PON M TR POT, bare head left
Reverse: VESTA, Vesta seated left on ornamental throne, holding patera and sceptre; S-C across field
Ref: RIC 38; Sear 1803
(3) Caligula 37-38 AD
Obverse: C CAESAR AVG GERMANICVS PON M TR POT, bare head of Caligula left.
Reverse: Reverse: VESTA above, S C across field, Vesta seated left, holding patera and sceptre.
Ref: RIC I 38; BMCRE I 46; RSC I 27.
(4) Caligula 37-41 AD
Obverse: laureate head right; ΓAIOΣ__KAIΣAP
Reverse: diademed head of Aphrodite right; AΦPOΔI_ΣIEΩN
Ref: RPC I 2845; BMC 97-8.
(5) Caligula 37-41 AD
AE As equivalent Thessalonica
Obverse: Γ KAIΣAΡ ΣEBAΣTOΣ, Head of Caligula facing left, wearing laurel wreath
Reverse: ΓEΡMANIKOΣ ΘEΣΣAΛONIKEΩN, Bare head of Germanicus facing left
Ref: RPC I 1572; Touratsoglou, Caligula ...
(6) Caligula 37-38 AD
AE 12 Units Bosporus
Obverse: ΓAIOY KAIΣAΡOΣ ΓEΡMANIKOY, Bare head of Caligula facing right
Reverse: No inscription, Head of King Aspurgus facing right, wearing diadem; BAP monogram and IB in fields
Ref: RPC I 1904
(7) Caligula | Antonia 37-41 AD
Obverse: Laureate head left; Γ KAIΣAP ΘEΣΣAΛONIKEΩN
Reverse: Veiled bust of Antonia (grandmother of Caligula); ANTΩNIA_ΣEBAΣTH
Ref: RPC 1574
(8) Caligula | Antonia 37-41 AD
Obverse: Laureate head left; Γ KAIΣAP ΘEΣΣAΛONIKEΩN
Reverse: Veiled bust of Antonia (grandmother of Caligula); ANTΩNIA_ΣEBAΣTH
Ref: RPC 1574
(9) Caligula | Germanicus 37-41 AD
AE unit Cnossus
Obverse: C CAESAR AVG GERMANICVS, Bare head of Caligula facing right
Reverse: GER CAESAR PVLCHRO III VARIO IIVIR, Bare head of Germanicus facing right
Ref: RPC I 994
(10) Rhoemetalces III | Caligula 38-41 AD
AE unit Thrace
Obverse: Diademed draped bust of Rhoemetalces III left; BAΣIΛEYΣ_POIMHTAΛKAΣ
Reverse: Laureate head of Caligula left; ΓAIΩ KAIΣAP_I ΣEBAΣΤΩ
Ref: Caligula RPC 1723; BMC 2; Jurukova ...