Ancient Greek theater has had a profound and lasting impact on modern performing arts and literature, laying the foundation for many contemporary practices and themes.

1. **Theatrical Structure**: The concept of structured plays, including divisions into acts and scenes, originated with Greek theater. The use of a chorus, prologues, and epilogues are elements that have influenced modern theater.

2. **Genres**: The Greeks pioneered the genres of tragedy and comedy, which remain central to modern theater. Their exploration of human experience, fate, and morality in tragedies, as well as social and political satire in comedies, continues to resonate in contemporary works.

3. **Character Archetypes**: Greek theater introduced enduring character archetypes, such as the tragic hero, the antagonist, and the comic fool. These archetypes are still used in modern literature and theater to explore complex human emotions and conflicts.

4. **Themes and Narratives**: Themes such as justice, honor, love, and the human condition explored in Greek plays are timeless and continue to be relevant. Modern narratives often draw on Greek myths and stories for inspiration.

5. **Theater Design**: The design of ancient Greek amphitheaters, with their emphasis on acoustics and visibility, influenced the architecture of modern theaters, ensuring that performances could be enjoyed by large audiences.

6. **Dramatic Techniques**: Techniques such as dramatic irony, catharsis, and the use of masks have roots in Greek theater. These techniques are frequently employed in modern storytelling to enhance emotional engagement and thematic depth.

7. **Cultural Significance**: Greek theater emphasized the role of the arts in society, promoting dialogue about civic duty, ethics, and the human experience. This cultural significance is mirrored in how contemporary theater and literature often reflect and critique societal issues.

The legacy of Ancient Greek theater is evident in the structures, themes, and techniques that continue to shape modern performing arts and literature, highlighting its enduring influence on the cultural landscape.