Greek theatre originated in ancient Greece around the 6th century BCE, primarily as a form of worship for the god Dionysus. It evolved from religious festivals that included music, dance, and storytelling, leading to the development of dramatic performances. The theatre was typically performed in large open-air venues called amphitheaters, which could accommodate thousands of spectators. Key elements included tragedy and comedy, with famous playwrights like Aeschylus, Sophocles, and Euripides contributing to the genre. These performances often explored themes of morality, fate, and human experience, influencing modern theatre significantly.