Tigran the Great died in 55 BC. Subsequently his son Artavazd ruled Armenia.
Adept of Hellenistic culture, Artavazd wrote plays and poems in Greek. The Greek tragedies were performed in his royal residence of Artashat on a regular basis. Historians testify that the head and the right hand of Crassus, the eminent Roman commander killed in a battle against the joint Persian and Armenian armies, was brought to Artavazd while he was enjoying the play of Euripides’s Bacchantes.
The ruling of Artavazd was unsuccessful: he lost many of the lands that Tigranes, his glorious father, had conquered. Marcus Antonius captured the Armenian King, shackled him and took to Egypt as a present to Cleopatra. With haughtiness, Artavazd refused to greet Cleopatra, and was decapitated. Armenia became a vassal state of the Roman Empire.
Sources:
Artavasdes II of Armenia – Wikipedia
http://www.armenian-history.com/Armenian_coins.htm