Barmas of Alexis Mikhailovich executed in Istanbul on his order in 1662. It is a round silk collar, adorned with seven precious medallions. The centre of medallions are round golden plates with religious compositions of colour enamels. Three large medallions are of particular interest. Two of them are not plane, like all the others, but a little bossy. They were to cover shoulders. The shape of the third medallion is a bit different, so it can be considered a central one. It is adorned with a scene of Our Lady sitting with a Baby in her lap, crowned by two angels. One shoulder medallion includes a cross confronted by Saints – Byzantine Emperor Constantine and his mother Helen, who were famous devotees of Christianity. Another shoulder medallion presented Basil the Great and Saint Warrior Mercury, piking Emperor Julian, enemy of Christians. A legend says he was killed by Saint Mercury, who pretended to be an enemy warrior. The precious holy of the XVIIth century may have hinted the role of the royal power in the Christian world and the mission of the very Russian Tsar.