Conversation so far:
When did Ramzan Kadyrov become Deputy Prime Minister?
After his father, then President, was assassinated on 9 May 2004, Ramzan Kadyrov was appointed as the First Deputy Prime Minister of the Chechen Republic on 10 May 2004.
How long did Ramzan Kadyrov serve as Deputy Prime Minister?
Ramzan Kadyrov remained the First Deputy Prime Minister until November 2005.
Did Ramzan Kadyrov do anything significant during his time as Deputy Prime Minister?
In August 2005, Ramzan Kadyrov declared that Europe's largest mosque would be built in place of the demolished ruins of Grozny's shattered downtown.

Question: Was the mosque ever built?
Self-contained rewrite: Was the mosque announced by Ramzan Kadyrov in 2005 ever built?