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Tetrarchy and Constantinian Dynasty
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284 - 305
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20 years, 5 months, and 11 days
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Diocletian
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286 - 305
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19 years and 1 month
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Maximian
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(293) 305 - 311
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6 years
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Galerius
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(293) 305 - 306
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1 year, 2 months and 24 days
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Constantius Chlorus
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(305) 306 - 307
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1 year
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Valerius Severus
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(306) 307 - 337
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30 years, 9 months, and 27 days
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Constantine the Great
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306 - 312
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6 years
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Maxentius
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308 - 324
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15 years, 10 months, and 7 days
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Licinius
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317
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5 months(?)
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Valerius Valens
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324
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2 months
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Martinian
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(305) 311 - 313
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2 years
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Maximinus Daia
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(317) 337 - 340
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3 years
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Constantine II
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337 - 361
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24 years, 5 months, and 12 days
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Constantius II
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337 - 350
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13 years
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Constans
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350
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9 months and 24 days
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Vetranio
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360 - 363
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3 years
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Julian
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363 - 364
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7 months and 22 days
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Jovian
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Valentinian Dynasty
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364 - 375
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11 years, 8 months and 22 days
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Valentinian
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364 - 378
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14 years, 4 months, and 12 days
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Valens
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367 - 383
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16 years and 21 days
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Gratian
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375 - 392
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16 years, 5 months, and 28 days
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Valentinian II
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383/384 - 388
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4/5 years
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Magnus Maximus
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383/384 - 388
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4/5 years
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Victor
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392 - 394
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2 years and 15 days
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Eugenius
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Western Empire - Theodosian Dynasty
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379 - 395
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15 years, 11 months, and 29 days
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Theodosius I
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(393) 395 - 423
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28 years, 6 months, and 29 days
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Honorius
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(407) 409 - 411
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2 years
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Constantine III
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(407) 409 - 411
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2 years
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Constans
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421
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6 months and 25 days
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Constantius III
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423 - 425
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2 years
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Joanes
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424 - 455
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30 years, 4 months, and 21 days
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Valentinian III
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Last Emperors of the Western Empire
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455
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2 months and 14 days
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Petronius Maximus
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455 - 456
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1 year, 3 months, and 8 days
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Avitus
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457 - 461
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4 years
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Majorian
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462
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4 years
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Libius Severus
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467 - 472
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5 years, 2 months, and 29 days
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Anthemius
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472
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3 months and 22 day
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Olybrius
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473 - 474
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1 year
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Glycerius
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474 - 475
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1 year / 6 years
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Julius Nepos
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475 - 476
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10 months and 4 days
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Romulus Augustulus
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Eastern Empire - Theodosian Dynasty
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379 - 395
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15 years, 11 months, and 29 days
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Theodosius I
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(383) 395 - 408
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13 years
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Arcadius
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402 - 450
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48 years
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Theodosius II
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450 - 453
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3 years
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Pulcheria
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450 - 457
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7 years
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Marcian
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Eastern Empire - Leonid Dynasty
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457 - 474
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16 years, 11 months, and 11 days
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Leo I
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474
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9 months and 23 days
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Leo II
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474 - 491
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17 years
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Zeno
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475 - 476
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1 year and 7 months
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Basiliscus
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475 - 476
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~1 year
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Marcus
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491 - 518
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27 years, 2 months, and 28 days
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Anastasius I
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