Conversation so far:
Where were the original productions of Fiddler on the Roof?
The original productions of Fiddler on the Roof were at the Imperial Theatre.
What city was the Imperial Theatre in?
The Imperial Theatre where Fiddler on the Roof was performed, is a Broadway theatre located at 249 West 45th Street in midtown-Manhattan.

Question: When did the production first open?
Self-contained rewrite: When did the production for the Fiddler on the Roof first open?