Patriarch Kyrill on the Legitimate Heir to the Russian Throne

H.I.H. The Grand Duchess Maria and her son Grand Duke George in audience with H.H. Pope (E) Benedict XVI

This is a bit dated but noteworthy. It comes from a Russian language source which as far as I can tell has received no notice in the English language press and media.

"Today, none of those persons who are descendants of the Romanovs are pretenders to the Russian throne. But in the person of Grand Duchess Maria Wladimirovna and her son, Georgii, the succession of the Romanovs is preserved — no longer to the Russian Imperial throne, but to history itself"

-Patriarch Kyrill of Moscow and All Russia 9 March 2013