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In page Theatre of Pompey:

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The sources on the dedication are contradictory. Pliny reports its dedication in 55 BC, the year of Pompey's second consulship. However, Gellius preserves a letter by Cicero's freedmen, Tiro that dates the dedication to 52 BC.[6] Two performances are associated with the dedication: Clytemnestra by Accius, and Equos Troianus either by Livius Andronicus or Gnaeus Naevius.[7] Clodius Aesopus, a renowned tragic actor, was brought out of retirement in order to act in the theatre's opening show. The show was also accompanied by gladiatorial matches featuring exotic animals.[4]