Prăznurirea celebrează apariţia [[Maica Domnului|Maicii Domnului]] în Vlaherne (Blachernae) în secolului al zecelea. La sfârşitul vieţii Sf. Andrei Yurodivyi (Andrei de Constantinopol), acesta şi ucenicul său, Sf. Epiphanius, şi un grup de oameni, au văzut pe Maica Domnului, Sf. Ioan Botezătorul, şi alţi câţiva sfinţi şi îngeri în timpul unei slujbe în Biserica din Vlaherne. The Blachernae Palace church was where several of her [[relics]] were kept. The relics were her robe, veil, and part of her belt that had been transferred from Palestine during the fifth century.
The Theotokos approached the center of the church, knelt down and remained in [[prayer]] for a long time. Her face was drowned in tears. Then she took her veil (cerement) off and spread it over the people as a sign of protection. During the time, the people in the city were threatened by a barbarian invasion. After the appearance of the Mother of God, the danger was averted and the city was spared from bloodshed and suffering.