Whose assassination did the son of Yusupov Palace participate in?
Yusupov Palace (Crimea):  It was built for Prince Felix Yusupov-Soumorokov-Elston, father of Prince Felix Yusupov (1887–1967) in 1909 by Nikolay Krasnov, the architect responsible for the imperial Livadia Palace in nearby Yalta.
i don't know