Valentinian I - Augustus of Imperium Romanum from 364 to 375
Flavius Valentinianus Augustus, also known as Valentinian the Great, was Roman emperor from 364 to 375. Upon becoming emperor he made his brother Valens co-emperor, giving him rule of the east while Valentinian retained the west.

Valentinian fought successfully against the Alamanni, Quadi, and Sarmatians. His brilliant general Count Theodosius defeated a revolt in Africa and the Great Conspiracy, a coordinated assault on Roman Britain by Picts, Scots, and Saxons. He rebuilt and improved the fortifications along the frontiers, even building fortresses in enemy territory.

He is often considered to be the "last great western emperor", and founded the Valentinian Dynasty, with his sons Gratian and Valentinian II succeeding him in the western half of the empire.
Valentinian I
Emperor Valentinian I of the Roman Empire

Obverse: DN VALENTINIANVS PF AVG,
Reverse: SECVRITAS REIPUBLICAE, Victory advancing left holding wreath and palm, D in left field
Ref: Sear 19492
(2) Valentinian I AD 367
Obverse: DN VALENTINIANUS PF AVG, Diademed, draped and cuirrassed bust right
Reverse: GLORIA ROMANORVM, Valentininan in military attire advancing right, head left, dragging captive by the hair with right hand and holding labarum in left hand, R in right field
Ref: Sear 18448
(3) Valentinian I 364-367 AD
Obverse: DN VALENTINIANUS PF AVG, Diademed, draped and cuirrassed bust right
Reverse: GLORIA ROMANORVM, Valentininan in military attire advancing right, head left, dragging captive by the hair with right hand and holding labarum in left hand * A in right field
Ref: Sear 19447
(4) Valentinian I 367-375 AD
Obverse: DN VALENTINIANUS PF AVG, Diademed, draped and cuirrassed bust right
Reverse: GLORIA ROMANORVM, Valentininan in military attire advancing right, head left, dragging captive by the hair with right hand and holding labarum in left hand. *F in right field, M in left field.
Ref: Sear 19450
(5) Valentinian I 367 AD
Obverse: DN VALENTINIANVS PF AVG, diademed, draped and cuirassed bust right
Reverse: SECVRITAS REIPVBLICAE, Victory advancing left holding wreath and palm, R in left field
Ref: Sear 19507
(6) Valentinian I AD 366
Obverse: D N VALENTINIANVS P F AVG, diademed, draped and cuirassed bust right
Reverse: RESTITVTOR REI P, Valentinian, in military attire, standing facing, head right, holding labarum and Victory on globe; SLVG• in exergue
Ref: RIC 6c; Sear 19365
(7) Valentinian I 367-375 A.D.
Obverse: DN VALENTINI-ANVS PF AVG, pearl diademed, draped, cuirassed bust right
Reverse: GLORIA RO-MANORVM, Emperor in military dress, walking right, head left, holding labarum, dragging captive behind him. Left field: S. Right field: D. Mintmark: BSISC.
Ref: RIC IX 14a,xiii
(8) Valentinian I 367-375 A.D.
Obverse: DN VALENTINI-ANVS PF AVG, pearl diademed, draped, cuirassed bust right.
Reverse: SECVRITAS-REIPVBLICAE, Victory advancing left, holding wreath and palm.
Ref: Siscia RIC IX 15a, xxi
(9) Valentinian I 364-375 A.D.
Obverse: DN VALENTINI-ANVS PF AVG, pearl diademed, draped, cuirassed bust right
Reverse: GLORIA RO-MANORVM, Emperor in military dress, walking right, head left, holding labarum, dragging captive behind him.
Ref: Siscia RIC 5a, ii, B
(10) Valentinian I 364-367 AD
Obverse: pearl-diademed, draped and cuirassed bust right; D N VALENTINI_ANVS P F AVG
Reverse: Valens advancing right, dragging captive and holding labarum; GLORIA RO_MANORVM / ASISC
Ref: RIC IX Siscia 5a, type i
(11) Valentinian I 364-367 AD
Obverse: pearl-diademed, draped and cuirassed bust right; D N VALENTI_NIANVS P F AVG
Reverse: Valens advancing right, dragging captive and holding labarum; GLORIA RO_MANORVM / OF _ II / CONST
Ref: RIC IX Arles 7a, type ii(b)
(12) Valentinian I 364-367 AD
Obverse: pearl-diademed, draped and cuirassed bust right; D N VALENTINI_ANVS P F AVG
Reverse: Valens advancing right, dragging captive and holding labarum; GLORIA RO_MANORVM / wreath / TES{A,B}
Ref: RIC IX Thessalonica 16a, type vi
(13) Valentinian I 367-375 AD
Obverse: pearl-diademed, draped and cuirassed bust right; D N VALENTINI_ANVS P F AVG
Reverse: Victory advancing left, holding wreath and palm; SECVRITAS__REIPVBLICAE / D / *ΔSISC
Ref: RIC IX Siscia 15a, type xi
(14) Valentinian I 364-367 AD
Obverse: pearl-diademed, draped and cuirassed bust right; D N VALENTINI_ANVS P F AVG
Reverse: Valentinian advancing right, dragging captive and holding labarum; GLORIA RO_MANORVM / * / A / ·ΓSISC
Ref: RIC IX Siscia 5a, type v
(15) Valentinian I 367-375 AD
Obverse: draped and cuirassed pearl-diademed bust right; D N VALENTINI_ANVS P F AVG
Reverse: Victory holding wreath and palm branch; SECVRITAS__REIPVBLICAE / * over D _ S / ΔSISC
Ref: RIC IX Siscia 15a, type xiv
(16) Valentinian I 364-367 AD
Obverse: pearl-didemed, draped and cuirassed bust right; D N VALENTINI_ANVS P F AVG
Reverse: Victory advancing left, holding wreath and palm; SECVRITAS__REIPVBLICAE / DΔSISC
Ref: RIC IX Siscia 7a, type iv
(17) Valentinian I 367-375 AD
Obverse: pearl-didemed, draped and cuirassed bust right; D N VALENTINI_ANVS P F AVG
Reverse: Valentinian I advancing right, dragging captive and holding labarum; GLORIA RO_MANORVM / D / *BSISC
Ref: RIC IX Siscia 14a, type xi
(18) Valentinian I 367-375 AD
AE Double Maiorina Nicomedia
Obverse: DN VALENTINIANVS P F AVG, Bust of Valentinian facing right, wearing pearl diadem, cuirass, and drapery
Reverse: RESTITVTOR REIPVBLICAE, Valentinian standing, looking right, in military dress, holding labarum and Victory on globe; SMNA in exergue
Ref: RIC IX 7a