List of Roman Emperors

Julio-Claudian
BC 27	Augustus
AD 14	Tiberius
37	Caligula
41	Claudius
54	Nero
68	Galba
68	Otho
68	Vitellius
Flavian
69	Vespasian
79	Titus
81	Domitian
96	Nerva
98	Trajan
117	Hadrian
Antonines
138	Antoninus Pius
161	Marcus Aurelius
180	Commodus
193	Pertinax
193	Didius Julianus
Severi
193	Septimius Severus
211	Caracalla
217	Macrinus
218	Elagabalus
222	Alexander Severus
CIVIL WAR
235	Maximinus
238	The two Gordiani
238	Pupienus and Balbinus
238	Gordian III
244	Philip
249	Decius
251	Gallus
254	Aemilianus
260	Valerian
260	Gallienus
268	Claudius
270	Quimillus
270	Aurelian
275	Tacitus
276	Probus
282	Carus
283	Carinus and Numerian
The Dominate
284	Diocletian and Maximian
305	Constantius and Galerius
311	Licinius and Constantine I
324	Constantine I
337	Constantine II
337	Constantius II
337	Constans
350	Constantius II
361	Julian
363	Jovian
Division of the Empire
364	Valentinian I
375	Gratian and Valentinian II
383	Valentinian II
392	Theodosius I
395	Honorius
423	Valentinian III
455	Maximus
455	Avitus
457	Majorian
461	Severus
467	Anthemius
472	Olybrius
473	Glycerius
474	Julius Nepos
475	Romulus Augustulus

After achieving world recognition for the Beaux-Arts classicism of the 1893 World's Columbian Exposition, Chicago architect Daniel Burnham designed Union Station in 1903 to serve as a "vestibule" to the capital city. Union Station in Washington DC was built to consolidate Washington's passenger train traffic into one location; it was opened to service in 1907. The station, modelled after the Baths of Caracalla in Rome, is 720 feet long; the waiting room is 120 feet wide and 219 feet long, and the vaulted ceiling reaches 96 feet above the floor.