Conversation so far:
What role did Alexander Vasilyevich Alexandrov play in the peace concert?
Alexandrov Ensemble was chosen to perform at the concert at Gendarmenmarkt following World War II.
When was the peace concert performed by the Alexandrov Ensemble held?
The Peace Concert was held in 1948.
Who organized the 1948 Peace Concert?
An American officer suggested a concert in the Gendarmenmarkt, and the French zone commander supported the suggestion. The musicians were to be provided by the USSR.
How many people attended the Alexandrov Ensemble Peace Concert?
30,000 people came to stand and watch for three hours.
Was the Alexandrov Ensemble Peace Concert a hit?
30,000 people came to stand and watch for three hours.
Did Alexander Vasilyevich Alexandrov have any views on the Peace Concert?
Alexandrov stated ...It is dominant in the history of the ensemble. It was necessary to make a new creative leap – from wartime military music to postwar relaxing harmony...“
Were there other singers who performed with Alexander Vasilyevich Alexandrov in the Peace Concert?

Question: How long was the concert?
Self-contained rewrite: How long was the Alexandrov Ensemble's Peace Concert?