Search by letter: T
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Search by letter: T
- Treaty of Paris
- Treaty of Paris (1229)
- Treaty of Paris (1259)
- Treaty of Paris (1303) — settlement over Gascony and Anglo‑French relations Treaty of Paris (1303)
- Treaty of Paris (1763)
- Treaty of Paris (1783): Peace agreement ending the American Revolutionary War Treaty of Paris (1783)
- Treaty of Paris (1920): Recognition of Romanian Sovereignty over Bessarabia Treaty of Paris (1920)
- Treaty of Portsmouth (1905): peace settlement ending the Russo–Japanese War Treaty of Portsmouth
- Treaty of Rome (1957): Founding Treaty of the European Economic Community Treaty of Rome
- Treaty of Saint-Clair-sur-Epte (911) — foundation of Normandy Treaty of Saint-Clair-sur-Epte
- Treaty of Saint-Germain-en-Laye (1919) Treaty of Saint-Germain-en-Laye
- Treaty of Shimonoseki (1895) Treaty of Shimonoseki
- Treaty of Tordesillas (1494): division of newly discovered lands Treaty of Tordesillas
- Treaty of Trianon (1920): terms, territorial changes and legacy Treaty of Trianon
- Treaty of Troyes (1420) and its impact on the French succession Treaty of Troyes
- Treaty of Verdun (843) and the division of the Carolingian Empire Treaty of Verdun
- Treaty of Versailles peace treaty
- Treaty of Waitangi (Te Tiriti o Waitangi) Treaty of Waitangi
- Treaty of Warsaw (1970)
- Treaty on the Final Settlement with Respect to Germany (2+4 Treaty) Treaty on the Final Settlement with Respect to Germany
- Treban — small commune in the Allier department, central France Treban
- Trèbes — commune in Aude, Occitanie, France Trèbes
- Trebetherick: coastal village on the Camel estuary, Cornwall Trebetherick
- Trébeurden
- Treble (association football): definitions, types, history and significance Treble (association football)
- Treble (singer): the child soprano voice in classical and church music Treble (singer)
- Treblinka extermination camp: overview, operation, and legacy Treblinka extermination camp
- Trebuchet — medieval siege engine and its origins Trebuchet
- Trecento: Italy in the Fourteenth Century Trecento
- Tree: structure, function, and importance Tree
- Tree fern
- Tree frog: arboreal frogs, adaptations, life cycle and conservation Tree frog
- Tree hollow (tree cavity): formation, ecology and importance Tree hollow
- Tree line (timberline): the ecological boundary of tree growth Tree line
- Tree of Knowledge of Good and Evil Tree of Knowledge
- Tree of Life
- Tree of life (biology): evolutionary relationships and phylogenetic concepts Tree of life (biology)
- Tree stump
- Tree-kangaroo (Dendrolagus) — arboreal marsupials of Australasia Tree-kangaroo
- Treehouse of Horror (The Simpsons episode)
- Treehouse of Horror II — episode overview, segments, and legacy Treehouse of Horror II
- Treehouse of Horror III
- Treepie: an overview of the arboreal corvids Treepie
- Treeshrew: small Southeast Asian mammals of the order Scandentia Treeshrew
- Trefcon — a small commune in Aisne, northern France Trefcon
- Treffort-Cuisiat — former commune in Ain, Auvergne-Rhône-Alpes, France Treffort-Cuisiat
- Trégastel — coastal commune on Brittany’s Pink Granite Coast Trégastel
- Trego County, Kansas: overview, history, and communities Trego County, Kansas
- Tréguier — historic town and cathedral on the Breton coast Tréguier
- Trehafod — village in the Rhondda Valley, Wales Trehafod
- Treignat (Allier, France) Treignat
- Treigny (Yonne) — former commune in central France Treigny
- Treilles, Aude — a small commune in Occitanie, southern France Treilles
- Treiten — Municipality in Seeland, Canton of Bern, Switzerland Treiten
- Treize-Septiers: a commune in Vendée, Pays de la Loire, France Treize-Septiers
- Treize-Vents: a rural commune in Vendée, Pays de la Loire Treize-Vents
- Trelawny Parish, Jamaica
- Trélex: municipality in the district of Nyon, canton of Vaud, Switzerland Trélex
- Trelleborg — port town in Skåne, Sweden Trelleborg
- Trelleborg Municipality
- Trelleborgs FF: Swedish football club from Trelleborg Trelleborgs FF
- Trélou-sur-Marne
- Trematode (fluke): parasitic flatworms and their life cycles Trematode
- Tremelo, Flemish Brabant, Belgium — Municipality including Baal Tremelo
- Tremona (Ticino) — former Swiss municipality merged into Mendrisio in 2009 Tremona
- Tremor: involuntary rhythmic muscle movement and its causes Tremor
- Tremors (1990 film): American sci-fi horror comedy set in rural Nevada Tremors (movie)
- Trempealeau County, Wisconsin
- Trempealeau River
- Trench: forms, uses and history of long narrow excavations Trench
- Trench coat: history, design, and modern use Trench coat
- Trench foot (immersion foot): causes, symptoms, treatment, and history Trench foot
- Trench warfare: layout, tactics, history, and consequences Trench warfare
- Trenčín: Slovak town on the Váh River with a historic castle Trenčín
- Trent Alexander-Arnold
- Trent Dilfer — NFL quarterback, Super Bowl starter and ESPN analyst Trent Dilfer
- Trent Green: Career, Playing Style, and Post‑Playing Work Trent Green
- Trent Lott
- Trent Reznor
- Trent, South Dakota
- Trento
- Trento Longaretti: Italian painter and figure of 20th-century figurative art Trento Longaretti
- Trenton: places, history and notable uses Trenton
- Trenton–Robbinsville Airport
- Trenton, Florida
- Trenton, Illinois
- Trenton, Kentucky (Todd County) Trenton, Kentucky
- Trenton, Missouri: County Seat and Regional Hub Trenton, Missouri
- Trenton, New Jersey — State Capital on the Delaware River Trenton, New Jersey
- Trenton, New York: Town overview and local profile Trenton, New York
- Trenton, Nova Scotia
- Trenton, Tennessee — County Seat of Gibson County Trenton, Tennessee
- Treponema: overview of the spirochete genus and related human infections Treponema
- Treponema pallidum: bacterium that causes syphilis and related treponematoses Treponema pallidum
- Tréprel — a rural commune in Calvados, Normandy Tréprel
- Treptow-Köpenick: overview of Berlin’s largest borough by area Treptow-Köpenick
- Treptower Tollensewinkel: an Amt in Mecklenburg-Vorpommern, Germany Treptower Tollensewinkel
- Tres Cantos — planned city north of Madrid Tres Cantos
- Très Riches Heures du duc de Berry
- Trescault — a small commune in Pas-de-Calais, northern France Trescault
- Tresnuraghes — a town and comune in Sardinia, Italy Tresnuraghes
- Tress MacNeille: Versatile Voice Actress of Animated Television Tress MacNeille
- Tresses (Gironde): a commune in southwestern France Tresses
- Tresson (Sarthe) — Commune in Pays de la Loire, France Tresson
- Treteau — commune in Allier, central France Treteau
- Trets — commune in Bouches-du-Rhône, Provence-Alpes-Côte d'Azur Trets
- Trettachspitze — distinctive peak of the Allgäu Alps Trettachspitze
- Treuchtlingen (Weißenburg-Gunzenhausen, Bavaria) Treuchtlingen
- Trevi Fountain (Fontana di Trevi) — Rome's Baroque landmark Trevi fountain
- Trévières — commune in Calvados, Normandy Trévières
- Tréville (Aude commune, Occitanie) Tréville
- Trévilly — former commune in Yonne, France Trévilly
- Treviso: historic Venetian town of canals, cuisine and provincial capital Treviso
- Trévol — a commune in Allier, central France Trévol
- Trevor Baxter (1932–2017), British actor and playwright Trevor Baxter
- Trevor Baylis (1937–2018) — inventor of the wind-up radio Trevor Baylis
- Trevor Bayne
- Trevor Cherry — English footballer and manager Trevor Cherry
- Trevor Colbourn
- Trevor Devall
- Trevor Francis
- Trevor Hemmings (1935–2021) Trevor Hemmings
- Trevor Howard (1913–1988) — English stage and film actor Trevor Howard
- Trevor Kidd — Canadian professional ice hockey goaltender Trevor Kidd
- Trevor Linden: Canadian ice hockey player and team executive Trevor Linden
- Trevor McDonald — British News Broadcaster and Journalist Trevor McDonald
- Trevor Michael Georges
- Trevor Noah: South African Comedian, Writer, and Former The Daily Show Host Trevor Noah
- Trevor Peacock (1931–2021) — English actor, screenwriter and songwriter Trevor Peacock
- Trevor Platt — British biological oceanographer (1942–2020) Trevor Platt
- Trevor van Riemsdyk — American NHL defenseman Trevor van Riemsdyk
- Trévoux — Historic town and former Dombes capital in Ain, France Trévoux
- Trey Gowdy: U.S. politician and former federal prosecutor Trey Gowdy
- Trey Lorenz
- Trey Parker
- Trey Songz (Tremaine Neverson) Trey Songz
- Trey, Vaud — municipality in Broye-Vully, Switzerland Trey, Vaud
- Treyarch: Developer of Call of Duty and Innovator of Zombies Mode Treyarch
- Treycovagnes — municipality in Vaud, Switzerland Treycovagnes
- Treynor, Iowa — overview, history, and community life Treynor, Iowa
- Treytorrens (Payerne) — Municipality in Vaud, Switzerland Treytorrens
- Treyvaux: Municipality in the Saane (Sarine) District of Fribourg, Switzerland Treyvaux
- Trézelles — commune in Allier, central France Trézelles
- Tréziers (Aude) — small commune in Occitanie, southern France Tréziers
- Tri-Cities (Washington) Tri-Cities, Washington
- Tri-City Americans (Western Hockey League team) Tri-City Americans
- Tri-State Tornado (March 18, 1925) — Deadliest U.S. Tornado Tri-State Tornado
- Triacontadigon (32-sided polygon) Triacontadigon
- Triacontagon (30-sided polygon) Triacontagon
- Triad (Swedish pop trio) Triad
- Triaize, Vendée (France) Triaize
- Trial (legal proceeding) Trial
- Trial and error: method of problem solving and learning Trial and error
- Trial by Jury (one-act operetta by Gilbert and Sullivan) Trial by Jury
- Trial by Ordeal: Historical Practice of Divine and Communal Judgment Trial by ordeal
- Trial in Absentia: Definition, Practice, and Legal Issues Trial in absentia
- Trial of Conrad Murray
- Triangle (basic geometry and properties) Triangle
- Triangle (musical instrument)
- Triangular number
- Triangular trade: three-way maritime commerce and its historical role Triangular trade
- Triangulum (constellation) Triangulum
- Triangulum Australe (Southern Triangle) Triangulum Australe
- Triangulum Galaxy (M33) Triangulum galaxy
- Triassic Period Triassic
- Triathlon: Overview, formats, equipment, history, and notable races Triathlon
- Triatominae (kissing bugs): biology, distribution, and public health importance Triatominae
- Tribadism and Genital Rubbing: Non-penetrative Genital-to-Genital Contact Tribadism
- Tribal chief: role, functions, and cultural variation Tribal chief
- Tribal Hidage: an Anglo-Saxon tribute and land-assessment list Tribal Hidage
- Tribe: social unit, organization, history and modern relevance Tribe
- Tribe (biology): a taxonomic rank between subfamily and genus Tribe (biology)
- Tribes of Israel: origin, organization, and historical legacy Tribes of Israel
- Tribunal: definition, roles, history, and types Tribunal
- Tribune East Tower (proposed Chicago skyscraper) Tribune East Tower
- Tribune Media
- Tribune of the Plebs (Roman Republic office) Tribune of the plebs
- Tribune Publishing (formerly Tronc) — U.S. newspaper publisher Tribune Publishing
- Tribune Tower (Chicago) — Neo‑Gothic landmark and repository of world fragments Tribune Tower
- Tribune, Kansas
- Tributary (river): definition, types, and significance Tributary
- Tributary state
- Tribute: payments, honors, and the history of submission and respect Tribute
- Tribute in Light — New York City memorial to the September 11 attacks Tribute in Light
- Tribute to Jerusalem — Alexander Calder's red stabile Tribute to Jerusalem
- Tribute to Uncle Ray — Stevie Wonder's second studio album (1962) Tribute to Uncle Ray
- Triceps brachii muscle
- Triceratops — the three-horned Late Cretaceous ceratopsian Triceratops
- Trichey — small rural commune in Yonne, Bourgogne-Franche-Comté Trichey
- Trichodesmium — filamentous, nitrogen‑fixing marine cyanobacteria Trichodesmium
- Trichome: Plant Surface Hairs — Types, Structure, and Biological Roles Trichome
- Trichomonas gallinae: avian protozoan parasite and disease overview Trichomonas gallinae
- Trichomoniasis — cause, symptoms, diagnosis, treatment and prevention Trichomoniasis
- Trichoptera (caddisflies): aquatic larvae and case-building insects Trichoptera
- Trichotillomania (Hair‑Pulling Disorder) Trichotillomania
- Trichromacy: Three-cone Color Vision in Humans and Other Animals Trichromacy
- Tricia Helfer — Canadian Model and Actress Tricia Helfer
- Tricia Nixon Cox: Early life, role as First Daughter, and public service Tricia Nixon Cox
- Tricity (Trójmiasto): Gdańsk, Gdynia and Sopot Tricity
- Trickery: deception, illusion and misdirection Trickery
- Trickle-down economics: theory, history, effects, and criticisms Trickle-down economics
- Tricky (Adrian Thaws) — English musician, producer and actor Tricky
- Triclinic crystal system Triclinic
- Tricolour (three-colour flag) Tricolour
- Tricycle
- Tridecagon (13‑gon): definition, properties, and uses Tridecagon
- Trident: The Three‑Pronged Spear — Design, History and Symbolism Trident
- Tridentine Mass (Extraordinary Form of the Roman Rite) Tridentine Mass
- Triei — Sardinian comune in the Province of Nuoro Triei
- Triengen — municipality in Sursee district, Canton of Lucerne Triengen
- Trient, Valais (Switzerland) Trient, Switzerland
- Trier: Germany’s ancient city on the Moselle, Roman heritage and wine culture Trier
- Trier of Fact (Finder of Fact): Role, Function, and Legal Importance Trier of fact
- Trier‑Saarburg: rural district in Rhineland‑Palatinate, Germany Trier-Saarburg
- Triesen: A concise guide to the Liechtenstein municipality Triesen
- Triesenberg, Liechtenstein: Mountain municipality and Walser heritage Triesenberg
- Trieste: Mediterranean port city at the crossroads of cultures Trieste
- Trifid Nebula (M20): Overview, Structure, and Observing Guide Trifid nebula
- Trifluoromethylphenylpiperazine (TFMPP) — overview and context Trifluoromethylphenylpiperazine
- Trifolium pratense (Red Clover): biology, habitat and uses Trifolium pratense
- Trifon Ivanov (Bulgarian footballer, 1965–2016) Trifon Ivanov
- Trigg County, Kentucky
- Trigger: mechanisms, signals and cultural uses Trigger
- Trigger (firearms)
- Triglav: Slovenia's Highest Peak in the Julian Alps Triglav
- Triglav (mythology): the three‑headed figure, the mountain, and related legends Triglav (mythology)
- Triglyceride (triacylglycerol): structure, role, and significance Triglyceride
- Trigonometric functions Trigonometric function
- Trigonometry: functions, principles, history, and applications Trigonometry
- Trikala (Thessaly, Greece) Trikala
- Trilemma
- Trilenium (Sash! album) Trilenium
- Trill consonant
- Trillian — multi‑protocol instant messaging client Trillian
- Trillion
- Trilobite: an overview of the extinct marine arthropod Trilobite
- Trilogy
- Trimbach — Municipality in Gösgen District, Canton of Solothurn Trimbach, Switzerland
- Trimble County, Kentucky
- Trimley railway station
- Trimley St. Martin
- Trimley St Mary — village and civil parish in Suffolk, England Trimley St. Mary
- Trimmis (Graubünden, Switzerland) Trimmis
- Trimstein: former municipality in Bern-Mittelland, canton of Bern Trimstein
- Trimurti — the Hindu trinity of Brahma, Vishnu and Shiva Trimurti
- Trin, Graubünden — municipality in Imboden, Switzerland Trin
- All India Trinamool Congress (Trinamool Congress) Trinamool Congress
- Trincomalee District — Eastern Province of Sri Lanka Trincomalee District
- Trinculo (moon)
- Tring, Buckinghamshire, England Tring
- Trini López: Singer, Guitarist, Actor and Guitar Designer Trini Lopez
- Trinidad and Tobago
- Trinidad and Tobago at the Olympics
- Trinidad and Tobago national football team
- Trinità d'Agultu e Vignola: overview of the Sardinian municipality Trinità d'Agultu e Vignola
- Trinitrotoluene (TNT) Trinitrotoluene
- Trinity (Christian doctrine) Trinity
- Trinity College
- Trinity College, Cambridge
- Trinity College, Oxford
- Trinity County, California
- Trinity County, Texas
- Trinity Hall, Cambridge: history, architecture, student life and notable associations Trinity Hall, Cambridge
- Trinny Woodall: British fashion adviser, author and television presenter Trinny Woodall
- Trinomen (zoological trinomial name) Trinomen
- Trinomial nomenclature (three-part scientific names) Trinomial nomenclature
- Trio — groups of three in music, culture and everyday use Trio
- Trio (music): ensembles and compositions for three performers Trio (music)
- Trio sonata: form, instrumentation, history and performance practice Trio sonata
- Triode: the three-electrode vacuum tube Triode
- Triodia — Australian hummock grasses commonly called spinifex Triodia
- Trip hop: the Bristol-originated downtempo music genre Trip hop
- Tripartite Pact (1940) — Agreement forming the World War II Axis Tripartite Pact
- Tripe (edible stomach lining) Tripe
- Triphyophyllum — the three-leaved carnivorous liana (Triphyophyllum peltatum) Triphyophyllum
- Tripitaka (Buddhist Canon) Tripitaka
- Triple (baseball)
- Triple Alliance (1882): Germany, Austria-Hungary and Italy Triple Alliance (1882)
- Triple Crown (snooker)
- Triple Crown of Thoroughbred Racing (United States) Triple Crown of Thoroughbred Racing
- Triple DES (3DES / TDEA): Overview, Structure, Security, and Uses Triple DES
- Triple Entente (United Kingdom, France and the Russian Empire) Triple Entente
- Triple H (Paul Levesque): wrestler, executive, and influence on modern pro wrestling Triple H
- Triple J — Australian youth radio network Triple J
- Triple jump (athletics event) Triple jump
- Triple Nine Society
- Triple point (phase equilibrium) Triple point
- Triple Zero (000) — Australia's national emergency telephone number Triple-Zero
- Tripod (three-legged support) Tripod
- Tripod (photography)
- Tripoli (Libya): capital city, history, and key features Tripoli
- Tripoli, Greece: Capital of Arcadia in the Peloponnese Tripoli, Greece
- Tripoli, Iowa
- Tripoli, Lebanon: Port city, history, and urban character Tripoli, Lebanon
- Tripp County, South Dakota
- Trippie Redd: American rapper, singer, and songwriter Trippie Redd
- Triptych: three-panel artworks, form, history and uses Triptych
- Tripura — a small northeastern state of India Tripura
- Tripureswar, a village in Dhading District, central Nepal Tripureswar
- Trireme: The Ancient Mediterranean Warship Trireme