After the fall of the imperial city, this church was razed to the ground and the materials from it were used for building the mosque of Sultan Bayezid. Nothing remained of that church's ancient beauty, except for a small and paltry chapel, almost completely buried in the ruins. This chapel had twenty-five steps going down into it, and a transom window on the roof, wherefrom it received a little light. Toward the western side of the chapel was the aforementioned holy Spring, fenced about with a railing, and with fish swimming in it. Such was the condition of the Spring until 1821. Then even that little remnant was destroyed, occasioned by the uprising of the Greek nation against the Ottoman Empire; the sacred Spring was buried with it and disappeared altogether.
But in the days of Sultan Mahmud, when those subject to him were rejoicing in their freedom to practice their religion, permission was sought by the Orthodox Christian community to rebuild at least part of the chapel. Thus the work was begun on July 26, 1833. When the excavation had been made, and the foundations of the ancient church were found, there was rebuilt -- by a later writ of permission from the Sultan -- not merely a chapel of the holy Spring, but another new church, constructed upon the foundations of the ancient one. The building of this spacious, beautiful, and most majestic temple began on September 14, 1833, and the work was completed on December 30, 1834. On February 2, 1835, the Ecumenical Patriarch Constantine II, serving the Liturgy together with twelve hierarchs and a great company of clergy, as well as a boundless multitude of Christians, performed the consecration of this sacred church and dedicated it to the glory of the Mother of God. On September 6, 1955, however, it was desecrated and destroyed again by the Moslem Turks; it has been restored again, but not to the former magnificence.
Apolytikion in the Third Tone
Kontakion in the Plagal of the Fourth Tone
SAINT OR FEAST POSTED THIS DATE 2010(with 2009's link here also and further, 2008's, even 2007!