Johannes (kejser)

(c) Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 3.0
Johannes på en romersk guldmønt

Johannes (fødselsår ukendt; død 425) var som tronraner vestromersk kejser fra 423 til 425.

Den første vestromerske kejser, Honorius, døde i august 423, og det stod uklart, hvem der skulle overtage kejserembedet. Johannes, der indtil da havde været en højtstående embedsmand, benyttede chancen og lod sig udråbe til kejser. Johannes blev dog ikke anerkendt som kejser af alle, frem for alt ikke af den østromerske kejser Theodosius 2., der ønskede, at kejserembedet skulle forblive i hans egen familie. Theodosius udråbte derfor Honorius' nevø Valentinian til kejser, hvorefter han sendte sin hær mod Italien for at afsætte Johannes. Johannes ventede forgæves på Flavius Aëtius' hunniske hjælpetropper og blev slået ved Ravenna. I maj 425 blev han afsat og fik en hånd hugget af, og et par måneder senere blev han halshugget.

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Solidus Johannes-s4283.jpg
(c) Classical Numismatic Group, Inc. http://www.cngcoins.com, CC BY-SA 3.0
Joannes. 423-425 AD. AV Solidus (4.36 gm). Ravenna mint.
D N IOHANNES PF AVG, rosette-diademed bust right
VICTORIA AVGGG, Emperor standing right, holding Victory, Labarum, foot on captive, R-V, CONOB.

RIC X 1901 (R2); Depeyrot 12/1.

Little is known of the origin and early career of Johannes (John), but at the time of the death of the western Emperor Honorius (August 15, 423 AD) he occupied a position of great influence as head of the palace bureaucracy in Ravenna. An ‘interregum’ of several months followed Honorius' death during which the eastern Emperor Theodosius II (402-450) was technically the ruler of the entire Empire. On 20 November the situation was dramatically changed by the proclamation of Johannes in Ravenna as emperor of the West. Theodosius refused to countenance this usurpation and decided to support the claim to the western throne of his young cousin, Valentinian, son of the late Emperor Constantius III and the Empress Galla Placidia. Towards the end of 424 a large army was despatched from the East with orders to remove Johannes from power and to install Valentinian III as emperor of the West. After various setbacks this task was accomplished and the unfortunate Johannes was taken prisoner in Ravenna and sent to Aquileia for execution. his reign had lasted little more than a year and a half.
The rare coinage of Johannes was issued mostly from his capital of Ravenna where at least five denominations were produced. This attractive solidus is of the usual ‘western’ design, with a profile bust of the emperor on obverse and his standing figure spurning a barbarian captive on reverse. The portrait depicts the emperor bearded, an unusual feature at this time and one which was sometimes associated with pagan sympathies.