| Teatr Polski Victoria | Teatr Polski Victoria | Poland, Łódź | 1882-10-29 | 1918-12-23 | 1882–1918 | 17 | |
| Teatro Goldoni | Teatro Goldoni | Italy, Venice, Sestiere San Marco | 1892-05-20 | 2022-02-06 | 1892–2022 | 17 | |
| Theatro Kyvelis | Theatro Kyvelis (Kyvelis Theater) | Greece, Athens | 1908-07-17 | 1953-03-15 | 1908–1953 | 17 | |
| Theater Oberhausen | Theater Oberhausen | Germany, Oberhausen, Will-Quadflieg-Platz 1 | 1972-12-05 | 2018-05-05 | 1972–2018 | 17 | |
| Tønsberg | Tønsberg | Norway, Tønsberg | 1889-03-21 | 1982-11-23 | 1889–1991 | 18 | |
| Théâtre Royal du Parc | Théâtre Royal du Parc | Belgium, Brussels, Rue de la Loi 3 | 1889-03-01 | 2023-06-18 | 1889–2023 | 18 | |
| Teatr Telewizji | Teatr Telewizji | Poland, Warsaw, Teatr TV, ul. Woronicza 17 | 1962-12-10 | 2009-02-16 | 1962–2009 | 18 | |
| Teatro Carignano | Teatro Carignano | Italy, Torino, Piazza Carignano, 6 | 1895-02-18 | 2025-06-08 | 1895–2025 | 19 | |
| Teatro Valle | Teatro Valle | Italy, Rome, Via del Teatro Valle, 22-32 | 1891-03-10 | 1893-03-19 | 1891–2008 | 19 | |
| Teatrul Naţional Cluj | Teatrul Naţional Cluj | Romania, Cluj-Napoca, Piaţa Ştefan cel Mare 2-4 | 1922-06-03 | 1940-03-09 | 1922–2016 | 19 | |
| Theater am Franzensplatz | Theater am Franzensplatz | Austria, Graz, Franzensplatz | 1891-10-10 | 1908-11-04 | 1891–1909 | 20 | |
| Théâtre de l'Oeuvre | Théâtre de l'Oeuvre | France, Paris, 55 Rue de Clichy | 1897-11-09 | 1904-03-12 | 1897–1964 | 20 | |
| Televisión Española (TVE) | Televisión Española (TVE) | Spain | 1964-07-22 | -- | 1964–2002 | 20 | |
| Teatr im. Juliusza Słowackiego | Teatr im. Juliusza Słowackiego | Poland, Kraków, pl. Św. Ducha 1 | 1910-04-30 | 1916-06-08 | 1910–2012 | 20 | |
| Teatret Hamar | Teatret Hamar | Norway, Hamar, Strandgata 23 | 1927-09-24 | 1984-04-04 | 1927–2008 | 20 | |
| Teatr Polski | Teatr Polski | Poland, Poznań, 27 Grudnia 8/10 | 1882-11-09 | 1971-01-23 | 1882–2008 | 21 | |
| Theater in Baden-Baden | Theater in Baden-Baden | Germany, Baden-Baden | 1887-07-08 | -- | 1887–1928 | 22 | |
| Teater Ibsen | Teater Ibsen | Norway, Skien, Hollenderigata | 1990-09-19 | 2023-10-28 | 1990–2023 | 22 | |
| Teatro Argentina | Teatro Argentina | Italy, Rome, Largo di Torre Argentina, 52 | 1919-08-28 | 2019-04-28 | 1919–2019 | 23 | |
| Theater in der Josefstadt | Theater in der Josefstadt | Austria, Vienna, Josefstädter Straße 26 | 1900-07-14 | 2024-04-23 | 1900–2023 | 23 | |
| Toneelschuur Haarlem | Toneelschuur Haarlem | Netherlands, Haarlem, Lange Begijnestraat 9 | 1987-12-02 | 2017-05-25 | 1987–2017 | 24 | |
| Teatr Miejski | Teatr Miejski | Poland, Krakow, Plac Świętego Ducha 1 | 1894-04-27 | 1912-05-06 | 1894–1912 | 26 | |
| Teatro Manzoni | Teatro Manzoni | Italy, Milan, Via Alessandro Manzoni | 1891-09-26 | 2023-02-26 | 1891–2023 | 26 | |
| Teatr Miejski | Teatr Miejski | Ukraine, Lviv, Svobody Ave., 28 | 1898-04-05 | 1917-08-25 | 1898–1918 | 39 | |
| Teatrul Naţional Iasi | Teatrul Naţional Iasi | Romania, Iaşi, Str. Agatha Bârsescu nr. 18 | 1894-04-07 | 2017-05-20 | 1894–2018 | 42 | |
| Teatrul National Bucuresti | Teatrul National Bucuresti | Romania, Bucharest, Bulevardul Nicolae Bălcescu, 2 | 1895-12-09 | 2024-01-28 | 1895–2024 | 47 | |
| Theatret i Trondheim | Theatret i Trondheim | Norway, Trondheim, Prinsens Gate 20 | 1856-04-02 | 1927-11-10 | 1856–1928 | 50 | |
| Trøndelag Teater | Trøndelag Teater | Norway, Trondheim, Prinsens Gate 20 | 1938-09-01 | 2025-05-14 | 1938–2025 | 59 | |
| Thalia-Theater | Thalia-Theater | Germany, Hamburg, Raboisen 67 | 1878-03-07 | 2018-10-28 | 1878–2018 | 91 | |
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