Loris Tjeknavorian's ''Rostam and Sohrab'', based on the tragedy of ''Rostam and Sohrab'' from Ferdowsi's epic poem ''Šāhnāme'', is an example of opera with Persian libretto. Tjeknavorian, a celebrated Iranian Armenian composer and conductor, composed it in 25 years, and it was finally performed for the first time at Tehran's Roudaki Hall, with Darya Dadvar in the role of Tahmina.