Tajemství (The Secret)
| genre | opera |
| music | Bedřich Smetana |
| original language | �esky |
| world premiere | 18 September, 1878, Prague (New Czech Theatre, Adolf Čech conductor) |
Prague National Theatre, Prague
| 26 Jun 2025, Thursday, at 19:00 | Secret  | Best available 1790 CZK |