Step 1: Understanding the Concept:
The question asks to identify the director of a landmark, site-specific production of Dharamvir Bharati's play Andha Yug.
Step 2: Detailed Explanation:
The 1963 production of Andha Yug is one of the most iconic events in the history of modern Indian theatre. It was directed by Ebrahim Alkazi, then the director of the National School of Drama (NSD). He chose the ruins of Feroz Shah Kotla (often associated with Purana Qila's environs) in Delhi as the venue. This environmental, open-air staging perfectly complemented the epic scale and tragic grandeur of the play, which is set in the aftermath of the Mahabharata war.
Step 3: Final Answer:
The open-air production of Andha Yug was directed by Ebrahim Alkazi.