Conversation so far:
When did Grigory die?
On October 16 [O.S.
October 5] 1791.
Why did he die?
Potemkin fell ill.
Did he have any specific medical conditions?
He fasted briefly and recovered some strength, but refused medicine and began to feast once again.

Question: Where did he die?
Self-contained rewrite: Where did Grigory Potemkin die?