Blachernae (Template:Lang-el) was a suburb in the northwestern section of Constantinople, the capital city of the Byzantine Empire. It was the site of a water source and a number of prominent churches were built there, most notably the great Church of St. Mary of Blachernae (Panagia Blacherniotissa), built by Empress Pulcheria in circa 450, expanded by Emperor Leo I (r. 457–474) and renovated by Emperor Justinian I (r. 527–565) in the 6th century.<ref name="ODB">Template:Harvnb.</ref>
The quarter is recorded as regio XIV in the early 5th-century Notitia Urbis Constantinopolitanae, where it is recorded as being enclosed by a wall of its own. The quarter was connected to the city proper at the construction of the Theodosian Walls, but the Church of St. Mary remained outside of the walls until 627, when Emperor Heraclius (r. 610–641) built another wall to enclose it.<ref name="ODB"/> By that time, the church had become the major Marian shrine of the city,<ref name="ODB"/> and the second-most important church in Constantinople after Hagia Sophia, if only because the emperors' residence was nearby. In 1347, Emperor John VI Kantakouzenos (r. 1347–1354) was crowned there, instead of at Hagia Sophia.
South of the church and situated on the city's Seventh Hill stood the imperial Palace of Blachernae, which was first erected in circa 500. During the Komnenian period, it became the favourite imperial residence, eclipsing the older Great Palace of Constantinople on the eastern end of the city.<ref name="ODB"/> Although the Latin emperors returned to the Bucoleon Palace, the Palaiologos emperors of the restored Byzantine Empire again used the Blachernae Palace as their main residence.<ref name="ODB"/> The Palace of Porphyrogenitus (Template:Lang-tr) and the so-called Prison of Anemas are the main surviving structures of the Palace of Blachernae, which was a complex of multiple buildings.
Following the fall of Constantinople to the Ottomans in May 1453, the Sultan's residence was moved to Topkap? Palace on the site of the ancient acropolis of Byzantium, opposite to the original site of the Great Palace, which had by this time fallen into complete ruin, and the Blachernae area (with the exception of the Palace of Porphyrogenitus) fell into disuse.
The historic Blachernae area is in the present-day Istanbul quarter known as Ayvansaray. The sacred spring, associated with the Virgin Mary, can still be visited today; in Turkish it is named Ayazma, a name derived from the Greek term hagiasma (Greek: Template:Lang), meaning "holy water".
Our Lady of Blachernae, an icon of the Theotokos from the church of the Blachernae.
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- Emperor Theophilus visits St Mary of Blachernae.jpg
Byzantine emperor Theophilus (r. 829–842), on horseback, visits the Church of St. Mary in the Constantinopolitan suburb of Blachernae.
- Atik Mustafa Pasha Mosque
- The Protection of the Mother of God
- Church of Panagia of Blachernae
- 3D Reconstruction of the Blachernae Walls at the Byzantium 1200 Project