That’s far too much to list exhaustively, but here is a wide-coverage set of (subject, predicate, object) triples about the Roman Empire. If you want more in any category, say so.

Identity and chronology
- (Roman Empire, also_known_as, Imperium Romanum)
- (Roman Empire, predecessor, Roman Republic)
- (Roman Empire, established_in, 27 BCE)
- (Roman Empire, founded_by, Augustus)
- (Augustus, birth_name, Gaius Octavius)
- (Augustus, won_battle, Battle of Actium)
- (Battle of Actium, date, 31 BCE)
- (Roman Empire, capital, Rome)
- (Roman Empire, capital_from_330_CE, Constantinople)
- (Constantinople, founded_by, Constantine I)
- (Constantinople, founded_in, 330 CE)
- (Roman Empire, peak_extent_under, Trajan)
- (Roman Empire, peak_date, 117 CE)
- (Roman Empire, peak_area, about 5 million square kilometers)
- (Roman Empire, population_peak, about 50 to 70 million)
- (Roman Empire, abbreviation, SPQR)
- (SPQR, expands_to, Senatus Populusque Romanus)
- (Western Roman Empire, traditional_end, 476 CE)
- (Western Roman Empire, last_emperor, Romulus Augustulus)
- (Romulus Augustulus, deposed_by, Odoacer)
- (Eastern Roman Empire, survived_until, 1453 CE)
- (Eastern Roman Empire, also_known_as, Byzantine Empire)
- (Byzantine Empire, self_designation, Basileia ton Romaion)

Territory and peoples
- (Roman Empire, spanned, Europe North_Africa Near_East)
- (Empire_at_height, bordered_by, Atlantic Ocean)
- (Empire_at_height, bordered_by, Rhine and Danube)
- (Empire_at_height, bordered_by, Sahara Desert)
- (Empire_at_height, bordered_by, Euphrates River)
- (Limes Germanicus, function, frontier_defense)
- (Hadrian’s Wall, location, Northern Britain)
- (Hadrian’s Wall, constructed_in, 122-128 CE)
- (Antonine Wall, built_in, 142 CE)
- (Antonine Wall, location, Scotland)

Government and institutions
- (Roman Empire, government_type, autocracy)
- (Emperor, title, Princeps)
- (Emperor, title_after_Diocletian, Dominus)
- (Emperor, title, Imperator)
- (Emperor, title, Pontifex Maximus)
- (Gratian, renounced_title, Pontifex Maximus)
- (Senate, role_under_empire, advisory_body)
- (Consul, status_under_empire, largely_ceremonial)
- (Praetorian Guard, role, imperial_guard)
- (Praetorian Guard, disbanded_by, Constantine I)
- (Praetorian Guard, disbanded_in, 312 CE)
- (Diocletian, established, Tetrarchy)
- (Tetrarchy, established_in, 293 CE)
- (Tetrarchy, senior_titles, Augusti)
- (Tetrarchy, junior_titles, Caesares)
- (Praetorian Prefect, evolved_into, chief_civil_administrator)
- (Prefect of the City, responsibility, order_in_Rome)
- (Fiscus, function, imperial_treasury)
- (Aerarium, function, state_treasury)
- (Cursus publicus, function, imperial_post)

Law and citizenship
- (Roman Law, foundational_text, Twelve Tables)
- (Twelve Tables, dated_to, 5th century BCE)
- (Roman Law, codified_as, Corpus Juris Civilis)
- (Corpus Juris Civilis, compiled_under, Justinian I)
- (Corpus Juris Civilis, date_range, 529-534 CE)
- (Theodosian Code, promulgated_in, 438 CE)
- (Caracalla, issued, Constitutio Antoniniana)
- (Constitutio Antoniniana, effect, granted_citizenship_to_free_inhabitants)
- (Constitutio Antoniniana, issued_in, 212 CE)
- (Roman Law, concept, patria_potestas)
- (Roman Law, distinguished, ius civile_and_ius_gentium)
- (Manumission, effect, freedom_for_slaves)
- (Freedmen, owed, obligations_to_patrons)
- (Citizenship, conferred, legal_privileges)

Administration and provinces
- (Provinces, categories, senatorial_provinces)
- (Provinces, categories, imperial_provinces)
- (Governor, title, proconsul)
- (Governor, title, legatus Augusti pro praetore)
- (Census, purpose, taxation)
- (Italia, privileged_status, exemption_from_tributum_until_reforms)
- (Diocletian, restructured, provinces)
- (Diocletian, increased_number_of, provinces)
- (Aegyptus, status, imperial_province)
- (Aegyptus, governed_by, equestrian_prefect)
- (Britannia, province_established, 43 CE)
- (Britannia, later_divided_into, Britannia Superior_and_Britannia Inferior)
- (Dacia, annexed_in, 106 CE)
- (Dacia, abandoned_in, 271 CE)
- (Judaea, renamed, Syria Palaestina)
- (Syria Palaestina, renamed_by, Hadrian)
- (Municipium, granted, local_self_government)
- (Colonia, settled_by, military_veterans)

Military
- (Roman Army, core_unit, legion)
- (Legion, typical_strength_early_empire, about_4800_soldiers)
- (Legion, subunits, cohorts)
- (Cohort, composed_of, centuries)
- (Century, commanded_by, centurion)
- (Aquila, role, legionary_standard)
- (Auxilia, recruited_from, non_citizens)
- (Auxilia, benefit, citizenship_upon_discharge)
- (Roman Navy, latin_name, classis)
- (Military_service, oath, sacramentum_militare)

Economy, money, and trade
- (Roman Economy, backbone, agriculture)
- (Latifundia, produced, cash_crops)
- (Coloni, tied_to, land)
- (Rome, depended_on, grain_imports_from_Egypt)
- (Annona, function, grain_dole_for_Rome)
- (Cura annonae, overseen_by, prefect_of_the_annona)
- (Roman Economy, used_currency, denarius)
- (Roman Economy, used_currency, sestertius)
- (Roman Economy, used_currency, aureus)
- (Roman Economy, used_currency, solidus)
- (Solidus, introduced_by, Constantine I)
- (Solidus, introduced_in, 312 CE)
- (Denarius, debased_during, Crisis_of_the_Third_Century)
- (Rome, traded_with, India)
- (Rome, imported, silk_from_China)
- (Red Sea ports, facilitated, Indo_Roman_trade)
- (Road_network, enabled, rapid_troop_and_goods_movement)

Engineering and infrastructure
- (Romans, built, extensive_road_network)
- (Roman Road Network, total_length_peak, over_80000_km)
- (Romans, used, concrete)
- (Roman concrete, latin_name, opus_caementicium)
- (Romans, perfected, arch_vault_and_dome)
- (Romans, built, aqueducts)
- (Aqua Appia, built_in, 312 BCE)
- (Aqua Claudia, completed_in, 52 CE)
- (Appian Way, begun_in, 312 BCE)
- (Appian Way, initiated_by, Appius Claudius Caecus)
- (Colosseum, inaugurated_in, 80 CE)
- (Colosseum, built_under, Vespasian_and_Titus)
- (Colosseum, capacity, about_50000)
- (Pantheon, rebuilt_by, Hadrian)
- (Pantheon, dome_diameter, about_43.3_meters)
- (Baths of Caracalla, completed_in, 216 CE)
- (Hypocaust, used_for, underfloor_heating)
- (Watermills, used_in, grain_milling)
- (Milestones, indicated, distances_in_Roman_miles)

Society and daily life
- (Roman Society, structure, hierarchical)
- (Family, head, paterfamilias)
- (Roman Society, relied_on, slavery)
- (Slaves, obtained_from, warfare_and_trade)
- (Patron, provided, protection_to_clients)
- (Clients, provided, support_to_patrons)
- (Women, rights, property_ownership_with_limitations)
- (Male_citizens, naming_convention, tria_nomina)
- (Toga, symbolized, Roman_citizenship)
- (Insulae, housed, urban_populations)
- (Ostia, function, port_of_Rome)

Culture, literature, and science
- (Official_language_west, Latin)
- (Common_administrative_language_east, Greek)
- (Vulgar Latin, diverged_into, Romance_languages)
- (Latin_alphabet, legacy, widespread_adoption)
- (Virgil, authored, Aeneid)
- (Ovid, authored, Metamorphoses)
- (Horace, genre, lyric_poetry)
- (Livy, authored, Ab_Urbe_Condita)
- (Tacitus, authored, Annals)
- (Suetonius, authored, The_Twelve_Caesars)
- (Pliny the Elder, authored, Natural_History)
- (Pliny the Younger, authored, Letters)
- (Seneca the Younger, genre, Stoic_philosophy)
- (Juvenal, authored, Satires)
- (Apuleius, authored, The_Golden_Ass)
- (Marcus Aurelius, authored, Meditations)
- (Galen, profession, physician)
- (Galen, advanced, anatomy_and_medicine)
- (Vitruvius, authored, De_architectura)
- (Frontinus, authored, De_aquaeductu)
- (Roman Art, favored, mosaics_and_frescoes)
- (Pompeii, destroyed_by, eruption_of_Vesuvius)
- (Herculaneum, buried_by, pyroclastic_flows)
- (Eruption_of_Vesuvius, occurred_in, 79 CE)
- (Circus Maximus, capacity_peak, over_150000)
- (Gladiatorial_games, venue, amphitheaters)
- (Chariot_racing, venue, circuses)
- (Naumachiae, staged, mock_naval_battles)

Religion and church-state
- (Traditional_Roman_religion, type, polytheism)
- (Imperial_cult, venerated, emperor)
- (Mithraism, popular_among, soldiers)
- (Judaism, under, Roman_rule)
- (Second_Temple, destroyed_in, 70 CE)
- (Jerusalem, besieged_by, Titus)
- (Christianity, persecuted_under, Diocletian)
- (Constantine I, issued, Edict_of_Milan)
- (Edict_of_Milan, issued_in, 313 CE)
- (Theodosius I, issued, Edict_of_Thessalonica)
- (Edict_of_Thessalonica, issued_in, 380 CE)
- (Edict_of_Thessalonica, declared, Nicene_Christianity_state_religion)
- (Public_pagan_sacrifices, banned_by, Theodosius I)
- (First_Council_of_Nicaea, convened_by, Constantine I)
- (First_Council_of_Nicaea, convened_in, 325 CE)

Emperors and reigns
- (Julius Caesar, role, dictator_perpetuo)
- (Julius Caesar, assassinated_in, 44 BCE)
- (Augustus, reigned, 27_BCE_to_14_CE)
- (Tiberius, reigned, 14_to_37_CE)
- (Caligula, reigned, 37_to_41_CE)
- (Claudius, reigned, 41_to_54_CE)
- (Nero, reigned, 54_to_68_CE)
- (Vespasian, reigned, 69_to_79_CE)
- (Titus, reigned, 79_to_81_CE)
- (Domitian, reigned, 81_to_96_CE)
- (Nerva, reigned, 96_to_98_CE)
- (Trajan, reigned, 98_to_117_CE)
- (Hadrian, reigned, 117_to_138_CE)
- (Antoninus Pius, reigned, 138_to_161_CE)
- (Marcus Aurelius, reigned, 161_to_180_CE)
- (Commodus, reigned, 180_to_192_CE)
- (Septimius Severus, reigned, 193_to_211_CE)
- (Caracalla, reigned, 198_to_217_CE)
- (Diocletian, reigned, 284_to_305_CE)
- (Constantine I, reigned, 306_to_337_CE)
- (Theodosius I, reigned, 379_to_395_CE)
- (Romulus Augustulus, reigned, 475_to_476_CE)
- (Justinian I, reigned, 527_to_565_CE)

Wars and key events
- (Caesar, conquered, Gaul)
- (Conquest_of_Gaul, date_range, 58_to_50_BCE)
- (Claudius, invaded, Britain)
- (Roman_Britain, established_in, 43_CE)
- (Trajan, conquered, Dacia)
- (Trajan, campaigned_against, Parthia)
- (Hadrian, abandoned, Trajan’s_eastern_conquests)
- (Battle_of_the_Teutoburg_Forest, occurred_in, 9_CE)
- (Varus, lost, three_legions)
- (First_Jewish_Roman_War, date_range, 66_to_73_CE)
- (Bar_Kokhba_Revolt, date_range, 132_to_136_CE)
- (Aurelian, reconquered, Palmyrene_Empire)
- (Palmyrene_Empire, ruled_by, Queen_Zenobia)
- (Zenobia, captured_in, 272_CE)
- (Gallic_Empire, existed_in, 260_to_274_CE)
- (Aurelian, defeated, Gallic_Empire)
- (Crisis_of_the_Third_Century, date_range, 235_to_284_CE)
- (Crisis_of_the_Third_Century, characterized_by, civil_war)
- (Crisis_of_the_Third_Century, characterized_by, plague)
- (Crisis_of_the_Third_Century, characterized_by, economic_instability)
- (Diocletian, issued, Edict_on_Maximum_Prices)
- (Edict_on_Maximum_Prices, issued_in, 301_CE)
- (Constantine I, defeated, Maxentius)
- (Battle_of_the_Milvian_Bridge, occurred_in, 312_CE)
- (Constantine I, founded, Constantinople)
- (Valerian, captured_by, Shapur_I)
- (Battle_of_Edessa, occurred_in, 260_CE)
- (Valens, died_at, Battle_of_Adrianople)
- (Battle_of_Ad
