In which festival was tragedy religiously performed in honor of Dionysus?

The correct answer is Dionysia, specifically in the context of Ancient Greek theater. The Dionysia was a major festival held in Athens in honor of the god Dionysus, the deity associated with wine, fertility, and theater. This festival involved various performances, including dramatic competitions that showcased tragedies, as well as comedies. The event marked a significant time for the city, uniting citizens through the shared experience of worship and artistic expression.

The term "City of Dionysia" refers to a specific celebration of the Dionysia festival held in Athens, which adds to the context but is not the primary name of the overarching festival. While "Komos" refers to a ritual of festivity and merriment that celebrated Dionysus, it did not specifically focus on tragedy. The "Thespis Festival," named after Thespis, one of the earliest known playwrights, is not specifically used to denote the festival associated with tragedy in honor of Dionysus but rather highlights individual contributions to theater during that era. Each of these terms pertains to aspects of the cultural practices surrounding theater and Dionysus, but the Dionysia is the primary festival where tragedy was performed religiously.