 Seen by some commentators, and probably by Ypsilantis himself, as an actual member of the Eteria, Vladimirescu endorsed the conspiracy in the belief that it had Russian support.However, in early 1821 the Congress of Laibach condemned the Greek revolution, imposing on Emperor Alexander I that he withdraw all endorsement for Ypsilantis' movement.Ypsilantis prolonged his other alliance, with Vladimirescu, only by playing upon words, not revealing to him that Russia's support remained uncertain.