Step 1: Concept Clarification:
The query requires identification of the playwright behind the drama "Raja," also recognized internationally as "The King of the Dark Chamber."
Step 2: In-depth Analysis:
"Raja" (1910) is a notable allegorical drama authored by the Nobel laureate from Bengal, Rabindranath Tagore. The narrative delves into the conflict between spiritual reality and outward pretense, focusing on a queen's yearning to encounter her king, who resides in seclusion within a darkened chamber. Tagore himself provided the English translation, which garnered global recognition.
Step 3: Conclusive Response:
Rabindranath Tagore is the author of the play "The King of the Dark Chamber" (also known as "Raja").