| Teatro Fabbricone | Teatro Fabbricone | Italy, Prato, Via Ferdinando Targetti, 12 | 1975-03-18 | 1980-05-11 | 1975–2002 | 5 | |
| Teatro Giulia di Barolo | Teatro Giulia di Barolo | Italy, Torino, piazza Santa Giulia, 2 - 10124 | 1975-04-10 | -- | 1975 | 1 | |
| Teatr Wspólczesny | Teatr Współczesny | Poland, Warsaw, ul. Mokotowska 13 | 1975-04-16 | -- | 1975–1981 | 2 | |
| The Questors Studio | The Questors Studio | England, London, 12 Mattock Ln | 1975-05- | 2017-12-05 | 1975–2015 | 4 | |
| Teatr Dramatyczny | Teatr Dramatyczny | Poland, Wałbrzych, Plac Teatralny 1 | 1975-05-17 | -- | 1975 | 1 | |
| Teatro Borgonovo | Teatro Borgonovo | Italy, Rivoli, via Roma, 149/C – 10098 | 1975-05-28 | -- | 1975 | 1 | |
| Teatro Castelar de Elda | Teatro Castelar de Elda | Spain, Elda (Alicante), C/ Travesía, 1 | 1975-08-18 | 2006-04-06 | 1975–2006 | 2 | |
| Teatro Carrión | Teatro Carrión | Spain, Valladolid, Calle Montero Calvo, 2 | 1975-09- | -- | 1975 | 1 | |
| Teatro del IMSS | Teatro del IMSS | Mexico, Aguascalientes | 1975-09-16 | -- | 1975 | 1 | |
| Theater am Aegi | Theater am Aegi | Germany, Hannover, Aegidientorplatz 2 | 1975-10-17 | -- | 1975–1982 | 2 | |
| Tromstun skole | Tromstun skole | Norway, Tomasjord, Tellusveien 1 | 1975-12-04 | 1976-01-16 | 1975 | 1 | |
| Teatro Spazio Uno | Teatro Spazio Uno | Italy, Rome, Vicolo dei Panieri, 3 | 1975-12-20 | 2011-12-11 | 1975–2011 | 2 | |
| Teatr Nowy | Teatr Nowy | Poland, Warsaw, Madalińskiego 10/16 | 1976-02-21 | -- | 1976–1991 | 2 | |
| Théâtre des Célestins | Théâtre des Célestins | France, Lyon, 4 Rue Charles Dullin | 1976-10-06 | 2019-11-10 | 1976–2019 | 8 | |
| Theater Rendsburg | Theater Rendsburg | Germany, Rendsburg, Hans-Heinrich-Beisenkötter-Platz 1 | 1976-10-09 | -- | 1976–1995 | 2 | |
| Teatro Comunale, Belluno | Teatro Comunale, Belluno | Italy, Belluno, Piazza dei Martiri, Belluno, Italia | 1976-11-12 | 2011-11-06 | 1976–2011 | 2 | |
| Teatro San Babila | Teatro San Babila | Italy, Milan, Corso Venezia, 2/A | 1976-11-16 | 2012-01-29 | 1976–2012 | 3 | |
| Theater Bonn | Theater Bonn | Germany, Bonn, Am Boeselagerhof 1 | 1976-12-04 | 2023-04-05 | 1976–2022 | 5 | |
| Teatrul Municipal Bacovia | Teatrul Municipal Bacovia | Romania, Bacău, Strada Iernii 7 | 1976-12-29 | 2015-05-10 | 1976–2016 | 6 | |
| Teatro Metastasio | Teatro Metastasio | Italy, Prato, Via Cairoli n.59 | 1977-01-05 | 2024-03-24 | 1977–2024 | 6 | |
| Théâtre Roger Salengro | Théâtre Roger Salengro | France, Lille | 1977-01-12 | 1977-02-07 | 1977 | 1 | |
| Theater am Rathausplatz | Theater am Rathausplatz | Germany, Paderborn | 1977-02-19 | -- | 1977 | 1 | |
| Teatro da AMI | Teatro da AMI | Brazil, Belo Horizonte, R. da Bahia, 1450 - Lourdes | 1977-05-17 | -- | 1977 | 1 | |
| Theater der Stadt Schweinfurt | Theater der Stadt Schweinfurt | Germany, Schweinfurt, Roßbrunnstraße 2 | 1977-09-23 | 2011-11-10 | 1977–2011 | 5 | |
| Teatar 199 | Teatar 199 | Bulgaria, Sofia, ul. "Slavyanska" 8 | 1977-10-11 | -- | 1977–1997 | 2 | |
| Teatro Comunale G. B. Pergolesi | Teatro Comunale G. B. Pergolesi | Italy, Jesi AN, Piazza della Repubblica, 9 | 1977-11-10 | 2005-02-02 | 1977–2005 | 3 | |
| Teatro Goldoni Corinaldo | Teatro Goldoni Corinaldo | Italy, Corinaldo, Via del Corso 66, 60013 | 1977-11-14 | 1977-11-18 | 1977 | 1 | |
| Teatro del Ciglio | Teatro del Ciglio | Italy, Lucca, Piazza del Giglio, 13/15, 55100 | 1977-11-19 | 2012-01-29 | 1977–2012 | 2 | |
| Teatro Comunale di Cagli | Teatro Comunale di Cagli | Italy, Cagli, Piazza Papa Niccolò IV, 61043 | 1977-11-27 | -- | 1977 | 1 | |
| Thompson Studio Theatre, NCSU | Thompson Studio Theatre, NCSU | United States of America, Raleigh, Dunn Avenue | 1977-12-05 | 2001-09-15 | 1977–2001 | 2 | |
| Teaterlokalet | Teaterlokalet | Norway, Evjemoen | 1978-01-06 | -- | 1978 | 1 | |
| Teatr Ochoty | Teatr Ochoty | Poland, Warsaw, Mikołaja Reja 9 | 1978-01-28 | -- | 1978 | 1 | |
| Telemark Teater | Telemark Teater | Norway, Skien, Hollenderigata | 1978-02-07 | -- | 1978–1987 | 3 | |
| Teatr Dramatyczny | Teatr Dramatyczny | Poland, Gdynia, Generała Józefa Bema 26 | 1978-02-17 | -- | 1978 | 1 | |
| Teatre Lliure (Gràcia) | Teatre Lliure (Gràcia) | Spain, Barcelona | 1978-02-23 | 2023-01-29 | 1978–2022 | 3 | |
| Thesbiteateret | Thesbiteateret | Norway, Tønsberg, Nordlysveien 4 c, 3113 Tønsberg | 1978-03-01 | -- | 1978 | 1 | |
| Teatro Nuovo Gian Carlo Menotti | Teatro Nuovo Gian Carlo Menotti | Italy, Spoleto, Via Vaita Sant'Andrea, 20, 06049 | 1978-03-06 | -- | 1978 | 1 | |
| Tangen samfunnshus | Tangen samfunnshus | Norway, Tangen | 1978-03-12 | 1978-10-22 | 1978 | 1 | |
| TF - 1 (Télévision Française 1) | TF - 1 (Télévision Française 1) | France | 1978-03-31 | -- | 1978 | 1 | |
| Teatr Współczesny | Teatr Współczesny | Poland, Szczecin, Wały Chrobrego 3 | 1978-04-28 | -- | 1978 | 1 | |
| Teatrul Victor Ion Popa Barlad | Teatrul Victor Ion Popa Barlad | Romania, Bârlad, Str. Vasile Pârvan | 1978-05-20 | -- | 1978 | 1 | |
| The Theatre 300 | The Theatre 300 | Japan, Tokyo | 1978-07-04 | 1984-09-09 | 1978–1984 | 2 | |
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