| Olaf Liliekrans, 19110618 | Olaf Liliekrans | 19110618 | 18th June 1911 | Rehearsal Theatre | Rehearsal Theatre | England | |
| Ordalie, 20231128 | Ordalie | 20231128 | 28th November 2023 | Scène nationale d’Albi-Tarn | Scène nationale d’Albi-Tarn | France | |
| Opory společnosti, 19550621 | Opory společnosti | 19550621 | 21st June 1955 | Severočeské divadlo Liberec | Severočeské divadlo Liberec | Czech Republic | |
| Oyuncaq Ev, 20041225 | Oyuncaq Ev | 20041225 | 25th December 2004 | Sheki Dram Theatre | Sheki Dram Theatre | Azerbaijan | |
| Opory společnosti, 19280309 | Opory společnosti | 19280309 | 9th March 1928 | Státní divadlo v Ostravĕ (Divadlo Jiřího Myrona) | Státní divadlo v Ostravĕ (Divadlo Jiřího Myrona) | Czech Republic | |
| Oblubienica Morza, 19101119 | Oblubienica Morza | 19101119 | 19th November 1910 | Teatr im. Juliusza Słowackiego | Teatr im. Juliusza Słowackiego | Poland | |
| Oblubienica Morza, 18991230 | Oblubienica Morza | 18991230 | 30th December 1899 | Teatr Miejski | Teatr Miejski | Poland | |
| Oblubienica Morza, 19111018 | Oblubienica Morza | 19111018 | 18th October 1911 | Teatr Miejski | Teatr Miejski | Ukraine | |
| Ordalie, 20240424 | Ordalie | 20240424 | 24th April 2024 | Teatre Nacional de Catalunya | Teatre Nacional de Catalunya | Spain | |
| O Inimigo do Povo, 19831209 | O Inimigo do Povo | 19831209 | 9th December 1983 | Teatro Cândido Mendes | Teatro Cândido Mendes | Brazil | |
| O Construtor, 19931118 | O Construtor | 19931118 | 18th November 1993 | Teatro da Graça | Teatro da Graça | Portugal | |
| Ones Who Return, 20231103 | Ones Who Return | 20231103 | 3rd November 2023 | Bug Theatre | The Bug Theatre | United States of America | |
| Ones Who Return, 20231208 | Ones Who Return | 20231208 | 8th December 2023 | Bunport Theatre, The | The Bunport Theatre | United States of America | |
| Ones Who Return, 20241115 | Ones Who Return | 20241115 | 15th November 2024 | Firehouse Theatre, The | The Firehouse Theatre | United States of America | |
| Ordalie, 20231019 | Ordalie | 20231019 | 19th October 2023 | Théâtre de Lyon | Théâtre de Lyon | France | |
| Ordalie, 20231122 | Ordalie | 20231122 | 22nd November 2023 | 13 vents, Théâtre des | Théâtre des 13 vents
(Theatre des treize vents) | France | |
| Obsession, 201906 | Obsession | 201906 | June
2019 | YUG Theatre | YUG Theatre | Azerbaijan | |
| Opory společnosti, 19110221 | Opory společnosti | 19110221 | 21st February 1911 | Zámecké divadlo Kolín | Zámecké divadlo Kolín | Czech Republic | 1 |
| Opory společnosti, 19381223 | Opory společnosti | 19381223 | 23rd December 1938 | Zemské divadlo v Brně | Zemské divadlo v Brně | Czech Republic | 1 |
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