Published by on July 15, 2026 Obv: IMP GALLIENVS P AVG, laureate and cuirassed bust right. Rev: GERMANICVS MAX V, two German captives bound and seated at the foot of a trophy. Shipped with USPS First Class.Publius Licinius Egnatius Gallienus(/lins/; c. 218 September 268) wasRoman emperorwith his fatherValerianfrom 253 to 260 and alone from 260 to 268. He ruled during theCrisis of the Third Centurythat nearly caused the collapse of the empire. He won numerous military victories againstusurpersand Germanic tribes, but was unable to prevent the secession of important provinces. His 15-year reign was the longest in half a century.Born into a wealthy and traditional senatorial family, Gallienus was the son ofValerianandMariniana. Valerian became Emperor in September 253 and had theRoman Senateelevate Gallienus to the ranks ofCaesarandAugustus. Valerian divided the empire between him and his son, with Valerian ruling the east and his son the west. Gallienus defeated the usurperIngenuusin 258 and destroyed anAlemanniarmy atMediolanumin 259. The defeat and capture of Valerian atEdessain 260 by theSasanian Empirethrew the Roman Empire into the chaos of civil war. Control of the whole empire passed to Gallienus. He defeated the eastern usurpersMacrianus MajorandLucius Mussius Aemilianusin 261262 but failed to stop the formation of the breakawayGallic Empireunder generalPostumus.Aureolus, another usurper, proclaimed himself emperor inMediolanumin 268 but was defeated outside the city by Gallienus and besieged inside. While the siege was ongoing, Gallienus was assassinated, stabbed to death by the officer Cecropius, as part of a conspiracy. The exact birth date of Gallienus is unknown. The 6th-century Greek chroniclerJohn Malalasand theEpitome de Caesaribusreport that he was about 50 years old at the time of his death, meaning he was born around 218. He was the son of EmperorValerianandMariniana, who may have been of senatorial rank, possibly the daughter ofEgnatius Victor Marinianus, and his brother wasValerianus Minor. Inscriptions on coins connect him withFaleriiinEtruria, which may have been his birthplace; it has yielded many inscriptions relating to his mother's family, theEgnatii.Gallienus marriedCornelia Saloninaabout ten years before his accession to the throne. She was the mother of three princes:Valerian II, who died in 258;Saloninus, who was named co-emperor but was murdered in 260 by the army of general Postumus; andMarinianus, who was killed in 268, shortly after his father was assassinated.Rise to power WhenValerianwas proclaimed emperor in September 253, he asked theSenateto ratify the elevation of Gallienus toAugustus. He was also designatedconsul ordinariusfor 254. AsMarcus Aureliusand his adopted brotherLucius Verushad done a century earlier, Gallienus and his father divided the Empire. Valerian left for the East to stem the Persian threat, and Gallienus remained in Italy to repel the Germanic tribes on the Rhine and Danube.Division of the empirehad become necessary due to its sheer size and the numerous threats it faced, and it facilitated negotiations with enemies who demanded to communicate directly with the emperor. Early reign Gallienus spent most of his time in the provinces of the Rhine area (Germania Inferior,Germania Superior,Raetia, andNoricum), though he almost certainly visited theDanubearea andIllyricumin the years from 253 to 258. According to Eutropius and Aurelius Victor, he was particularly energetic and successful in preventing invaders from attacking the German provinces and Gaul, despite the weakness caused by Valerian's march on Italy againstAemilianusin 253.According to numismatic evidence, he seems to have won many victories there, and a victory inRoman Daciamight also be dated to that period. Even the hostile Latin tradition attributes success to him at this time. In 255 or 257, Gallienus was made consul again, suggesting that he briefly visited Rome on those occasions, although no record survives.During his Danube sojourn (Drinkwater suggests in 255 or 256), he proclaimed his elder sonValerian IICaesar and thus official heir to himself and Valerian I; the boy probably joined Gallienus on campaign at that time, and when Gallienus moved west to the Rhine provinces in 257, he remained behind on the Danube as the personification of Imperial authority. Revolts and usurpers Further information:Gallienus usurpers Ingenuus revolt Aureusof Gallienus marked: GALLIENVS AVG. Sometime between 258 and 260 (the exact date is unclear), while Valerian was distracted with the ongoing invasion ofShapur Iin the East, and Gallienus was preoccupied with his problems in the West,Ingenuus, governor of at least one of the Pannonian provinces, took advantage and declared himself emperor. Valerian II had apparently died on the Danube, most likely in 258. Ingenuus may have been responsible for Valerian II's death. Alternatively, the defeat and capture of Valerian at thebattle of Edessamay have been the trigger for the subsequent revolts of Ingenuus,Regalianus, andPostumus.[13]In any case, Gallienus reacted with great speed. He left his sonSaloninusas Caesar atCologne, under the supervision of Albanus (or Silvanus) and the military leadership of Postumus. He then hastily crossed theBalkans, taking with him the new cavalry corps (comitatus) under the command ofAureolusand defeated Ingenuus atMursaorSirmium.Ingenuus was killed by his own guards or committed suicide by drowning himself after the fall of his capital, Sirmium. Alemanni invasion A major invasion by theAlemanniand other Germanic tribes occurred between 258 and 260 (it is hard to fix the precise date of these events),probably due to the vacuum left by the withdrawal of troops supporting Gallienus in the campaign against Ingenuus.Franksbroke through the lower Rhine, invadingGaul, some reaching as far as southern Spain, sacking Tarraco (modernTarragona). The Alemanni invaded, probably throughAgri Decumates(an area between the upper Rhine and the upper Danube),likely followed by theJuthungi.After devastating Germania Superior and Raetia (parts of southernFranceandSwitzerland), they entered Italy, the first invasion of the Italian peninsula, aside from its most remote northern regions, sinceHannibal500 years before. When invaders reached the outskirts of Rome, they were repelled by an improvised army assembled by the Senate, consisting of local troops (probably praetorian guards) and the strongest of the civilian population. On their retreat through northern Italy, they were intercepted and defeated in thebattle of Mediolanum(near present-dayMilan) by Gallienus' army, which had advanced from Gaul, or from the Balkans after dealing with the Franks. The battle of Mediolanum was decisive, and the Alemanni did not bother the empire for the next ten years. The Juthungi managed to cross the Alps with their valuables and captives from Italy.A historian in the 19th century suggested that the initiative of the Senate gave rise to jealousy and suspicion by Gallienus, thus contributing to his exclusion of senators from military commands. Regalianus revolt Around the same time,Regalianus, who held some command in the Balkans, was proclaimed emperor. The reasons for this are unclear, and theHistoria Augusta(almost the sole resource for these events) does not provide a credible story. It is possible the seizure can be attributed to the discontent of the civilian and military provincials, who felt the defense of the province was being neglected. Regalianus held power for some six months and issued coins bearing his image. After some success against theSarmatians, his revolt ended when theRoxolaniinvadedPannoniaand killed Regalianus in taking the city ofSirmium.There is a suggestion that Gallienus invited the Roxolani to attack Regalianus, but other historians dismiss the accusation. It is also suggested that the invasion was finally checked by Gallienus nearVeronaand that he directed the restoration of the province, probably in person. Capture of Valerian In the East, Valerian was confronted with serious troubles. Bands of "Scythai" began a naval raid ofPontus, in the northern part of Asia Minor. After ravaging the province, they moved south intoCappadocia. A Roman army from Antioch, under Valerian, tried to intercept them but failed. According toZosimus, this army was infected by a plague that gravely weakened it. In that condition, this army had to repel a new invasion of the province ofMesopotamiabyShapur I, ruler of theSassanid Empire. The invasion occurred probably in the early spring of 260.The Roman army was defeated at theBattle of Edessa, and Valerian was taken prisoner. Shapur's army raidedCiliciaandCappadocia(in present-dayTurkey), sacking, as Shapur's inscriptions claim, 36 cities. Macrianus revolt It took a rally by an officer namedCallistus(Balista), a fiscal official namedFulvius Macrianus, the remnants of the Roman army in the east, andOdenathusand hisPalmyrenehorsemen to turn the tide against Shapur. The Sassanids were driven back, but Macrianus proclaimed his two sonsQuietusandMacrianus(sometimes misspelled Macrinus) as emperors. Coins struck for them in major cities of the East indicate acknowledgement of the usurpation. The two Macriani left Quietus, Ballista, and, presumably, Odenathus to deal with the Persians while they invaded Europe with an army of 30,000 men, according to theHistoria Augusta. At first they met no opposition. The Pannonian legions joined the invaders, being resentful of the absence of Gallienus. He sent his successful commander Aureolus against the rebels, however, and the decisive battle was fought in the spring or early summer of 261, most likely in Illyricum, althoughZonaraslocates it in Pannonia. In any case, the army of the usurpers was defeated and surrendered, and their two leaders were killed. In the aftermath of the battle, the rebellion of Postumus had already started, so Gallienus had no time to deal with the rest of the usurpers, namely Balista and Quietus. He came to an agreement with Odenathus, who had just returned from his victorious Persian expedition. Odenathus received the title ofdux Romanorumand besieged the usurpers, who were based atEmesa. Eventually, the people of Emesa killed Quietus, and Odenathus arrested and executed Balista about November 261. Postumus revolt After the defeat at Edessa, Gallienus lost control over the provinces of Britain, Spain, parts of Germania, and a large part of Gaul when another general,Postumus, declared his own realm (usually known today as theGallic Empire). The revolt partially coincided with that ofMacrianusin the East. Gallienus had installed his son Saloninus and his guardian,Silvanus, in Cologne in 258. Postumus, a general in command of troops on the banks of the Rhine, defeated some raiders and took possession of their spoils. Instead of returning it to the original owners, he preferred to distribute it amongst his soldiers. When news of this reached Silvanus, he demanded the spoils be sent to him. Postumus made a show of submission, but his soldiers mutinied and proclaimed him emperor. Under his command, they besieged Cologne, and after some weeks the defenders of the city opened the gates and handed Saloninus and Silvanus to Postumus, who had them killed.The dating of these events was long uncertain, but aninscriptiondiscovered in 1992 atAugsburgindicates that Postumus had been proclaimed emperor by September 260. Postumus claimed the consulship for himself and one of his associates, Honoratianus, but according to D.S. Potter, he never tried to unseat Gallienus or invade Italy. Upon receiving news of the murder of his son, Gallienus began gathering forces to face Postumus. The invasion of the Macriani forced him to dispatch Aureolus with a large force to oppose them, however, leaving him with insufficient troops to battle Postumus. After some initial defeats, the army of Aureolus, having defeated the Macriani, rejoined him, and Postumus was expelled. Aureolus was entrusted with the pursuit and deliberately allowed Postumus to escape and gather new forces. Gallienus returned in 263 or 265 and surrounded Postumus in an unnamed Gallic city. During the siege, Gallienus was severely wounded by an arrow and had to flee. The standstill persisted until his later death,and theGallic Empireremained independent until 274. Aureusof Gallienus, minted inMediolanum(Milan), dated 262 Aemilianus revolt In 262, the mint inAlexandriastarted to again issue coins for Gallienus, demonstrating that Egypt had returned to his control after suppressing the revolt of the Macriani. In spring of 262, the city was wrenched by civil unrest as a result of a new revolt. The rebel this time was the prefect of Egypt,Lucius Mussius Aemilianus, who had already given support to the revolt of the Macriani. The correspondence of bishopDionysius of Alexandriaprovides a commentary on the background of invasion, civil war, plague, and famine that characterized this age. Knowing he could not afford to lose control of the vital Egyptian granaries, Gallienus sent his general Theodotus against Aemilianus, probably by a naval expedition. The decisive battle probably took place nearThebes, and the result was a clear defeat of Aemilianus.In the aftermath, Gallienus became Consul three more times in 262, 264, and 266. Herulian invasions In the years 267269,Gothsand other barbarians invaded the empire in great numbers. Sources are extremely confused on the dating of these invasions, the participants, and their targets. Modern historians are not even able to discern with certainty whether there were two or more of these invasions or a single prolonged one. It seems that, at first, a major naval expedition was led by theHerulistarting from north of theBlack Seaand leading to the ravaging of many cities of Greece (among them,AthensandSparta). Then another, even more numerous army of invaders started a second naval invasion of the empire. The Romans defeated the barbarians on sea first. Gallienus' army then won a battle inThrace, and the emperor pursued the invaders. According to some historians, he was the leader of the army who won the greatBattle of Naissus, while the majority believes that the victory must be attributed to his successor,Claudius II. Aureolus revolt In 268, at some time before or soon after the battle of Naissus, the authority of Gallienus was challenged byAureolus, commander of the cavalry stationed inMediolanum(Milan), who was supposed to keep an eye onPostumus. Instead, he acted as deputy to Postumus until the very last days of his revolt, when he seems to have claimed the throne for himself.The decisive battle took place at what is nowPontirolo Nuovonear Milan; Aureolus was clearly defeated and driven back to Milan. Gallienus laid siege to the city but was murdered during the siege. There are differing accounts of the murder, but the sources agree that most of Gallienus' officials wanted him dead. According to the Historia Augusta, an unreliable source compiled long after the events it describes, a conspiracy was led by the commander of the guardAurelius HeraclianusandLucius Aurelius Marcianus. Marcianus's role in the conspiracy is not confirmed by any other ancient source. Assassination Cecropius, commander of the Dalmatians, spread the word that the forces of Aureolus were leaving the city, and Gallienus left his tent without his bodyguard, only to be struck down by Cecropius. One version has Claudius selected as emperor by the conspirators, another chosen by Gallienus on his death bed; theHistoria Augustawas concerned to substantiate the descent of theConstantinian dynastyfrom Claudius, and this may explain its accounts, which do not involve Claudius in the murder. The other sources (Zosimusi.40 andZonarasxii.25) report that the conspiracy was organized by Heraclianus, Claudius, andAurelian. According to Aurelius Victor and Zonaras, on hearing the news that Gallienus was dead, the Senate in Rome ordered the execution of his family (including his brother Valerianus and son Marinianus) and their supporters, just before receiving a message from Claudius to spare their lives and deify his predecessor.The tomb of Gallienus is thought to be located to the south of Rome, at the IXth mile of theVia Appia. Arch of Gallienusin Rome dedicated to, rather than built by, Gallienus. Military reforms He contributed to military history as the first to commission primarilycavalryunits, theComitatenses, that could be dispatched anywhere in the Empire in short order. This reform arguably created a precedent for the future emperorsDiocletianandConstantine I. The biographerAurelius Victorreports that Gallienus forbadesenatorsfrom becoming military commanders.This policy undermined senatorial power, as more reliableequestriancommanders rose to prominence. In Southern's view, these reforms and the decline in senatorial influence not only helped Aurelian to salvage the Empire, but they also make Gallienus one of the emperors most responsible for the creation of theDominate, along withSeptimius Severus, Diocletian, and Constantine I. Decree of Toleration The capture of Valerian in the year 259 forced Gallienus to issue the first official declaration of tolerance with regard to the Christians, restoring their places of worship and cemeteries, therefore implying a recognition of the property of the Church. However, the edict did not turn Christianity into an official religion