Greek Theatre is an amphitheatre and performance venue located in Griffith Park, Los Angeles, California, which has been hosting various live performances and music concerts since its opening in the early 1930s. Today, the theatre is owned by the City of Los Angeles and operated by ASM Global. Designed by architects Samuel Tilden Norton, Frederic…Greek Theatre is an amphitheatre and performance venue located in Griffith Park, Los Angeles, California, which has been hosting various live performances and music concerts since its opening in the early 1930s. Today, the theatre is owned by the City of Los Angeles and operated by ASM Global. Designed by architects Samuel Tilden Norton, Frederick Hastings Wallisand, and Tacoma firm Heath, Gove, & Bell, the main stage and seating layout were inspired by Ancient Greek-style amphitheaters.