It was the admiral Mikhail Lazarev who came up with the idea to build St. Vladimir's Cathedral in Sevastopol rather than in Chersonesus as was originally intended.
The original design was submitted by Konstantin Thon for the Chersonesus Cathedral.
[1] Archbishop Joachim (Levitsky) was supposedly martyred by Bolsheviks inside St Vladimir's Cathedral in April 1920 (or perhaps as late as 1921) by being crucified upside-down on the royal doors of the iconostasis.
The cathedral's archpriest, Aleksei Nazarevsky, was also allegedly murdered along with him, although the details of when either man died, yet alone how, are not clear.
Sevastopol was under the occupation of the White Russian forces of Wrangel until November 1920, and the last definite information about Levitsky is his departure for the city in 1918.