The Monastery of the Transfiguration, known locally as Hristo [Christ] Monastery, is a prominent Greek Orthodox monastery that has served the Greek Orthodox community of Constantinople (modern Istanbul) since the time of the Byzantine Empire.
 The monastery is located on the island of Kınalıada, one of the Prince Islands in the Sea of Marmara.
 It is situated on one of the highest peaks on the island called Hristo Peak (93 meters), which is named after the Monastery.
 The Monastery is especially known as a destination for exiled Byzantine Emperors in the 11th century.
Hagia Sophia means either "Holy Wisdom" or "Saint Sophia" (Ἁγία Σοφία , Agia Sophia in Greek, Sancta Sophia in Latin, Ayasofya in Turkish).
 "The Holy Wisdom of God" is a name for the Second Person of the Trinity.
Saint Sophia Greek Orthodox Cathedral was founded as a church in 1904 to serve the Greek Orthodox residents of the District of Columbia.
 In 1962, the church was elevated to a cathedral under the jurisdiction of the Archbishop of America in New York City and serves as his cathedral in Washington.
 The church is not named for Saint Sophia the martyr, but rather the Holy Wisdom of God in the tradition of Hagia Sophia of Constantinople.
 The building is in the Neo-Byzantine style with a central dome that reaches 80 ft in height.
The Church of St. Polyeuctus (Greek: , "Hagios Polyeuktos") was an ancient Byzantine church in Constantinople (now Istanbul, Turkey) built by the noblewoman Anicia Juliana and dedicated to Saint Polyeuctus.
 Intended as an assertion of Juliana's own imperial lineage, it was a lavishly decorated building, and the largest church of the city before the construction of the Hagia Sophia.
 It introduced the large-scale use of Sassanid Persian decorative elements, and may have inaugurated the new architectural type of domed basilica, perfected in the later Hagia Sophia.
Zeyrek Mosque (full name in Turkish: "Molla Zeyrek Camii" ) or Monastery of the Pantocrator (in Turkish: "Pantokrator Manastırı" ), is a significant mosque in Istanbul, made of two former Eastern Orthodox churches and a chapel.
 It represents the most typical example of architecture of the Byzantine middle period in Constantinople and is, after Hagia Sophia, the second largest religious edifice built by the Byzantines still standing in Istanbul.
"Sophia" means "wisdom" in Greek; e.g., "Hagia Sophia" means "Holy Wisdom".
The Transfiguration Monastery (Bulgarian: Преображенски манастир , "Preobrazhenski manastir") or the Monastery of the Holy Transfiguration of God (манастир "Свето Преображение Господне", "manastir "Sveto Preobrazhenie Gospodne"") is an Eastern Orthodox monastery located in the Dervent gorge of the Yantra River.
 It lies near the village of Samovodene, seven kilometres north of Veliko Tarnovo, in central northern Bulgaria.
 It is one of the five stauropegic monasteries of the Bulgarian Orthodox Church.
Hagia Sophia ( ; from the Greek: Αγία Σοφία , ] , "Holy Wisdom"; Latin: "Sancta Sophia" or "Sancta Sapientia"; Turkish: "Ayasofya" ) was a Greek Orthodox Christian patriarchal basilica (church), later an imperial mosque, and is now a museum (Ayasofya Müzesi) in Istanbul, Turkey.
 The Roman Empire's first Christian Cathedral, from the date of its construction in 537 AD, and until 1453, it served as an Eastern Orthodox cathedral and seat of the Patriarch of Constantinople, except between 1204 and 1261, when it was converted by the Fourth Crusaders to a Roman Catholic cathedral under the Latin Empire.
 The building was later converted into an Ottoman mosque from 29 May 1453 until 1931.
 It was then secularized and opened as a museum on 1 February 1935.
 Famous in particular for its massive dome, it is considered the epitome of Byzantine architecture and is said to have "changed the history of architecture".
 It remained the world's largest cathedral for nearly a thousand years, until Seville Cathedral was completed in 1520.
Saint Sophia Greek Orthodox Cathedral (in Greek: Ἁγία Σοφία, Hagia Sophia) is a Greek Orthodox church built in 1952, in what was then the Greek section of Central Los Angeles, California.
 It is located at West 15th Street and South Normandie Avenue in the present day Harvard Heights neighborhood.
Nicholaus Kanabus was elected Emperor of the Byzantine Empire during the 4th Crusade on 25 or 27 January 1204 by an assembly of the Byzantine Senate, priests, and the mob of Constantinople in direct opposition to co-emperors Isaac II and Alexios IV.
 Nicholaus was a young noble (probably a relative of Angelid emperors) who was chosen after three days of sorting through several unwilling candidates and refused to assume the lofty position.
 Though popularly chosen, he never accepted imperial power, and took Sanctuary in the bowels of Hagia Sophia.
 Alexios V "Mourtzouphlos", who had deposed Emperors Isaac II and Alexios IV, offered him a prominent position in his own administration, but Nicholaus adamantly rejected these terms.
 On February 8, after rebuffing an imperial summons, Emperor Nicholaus Kanabus was dragged out of the church, in which he had sought refuge, and strangled on the ornate marble steps of Hagia Sophia.

Question: Hagia Sophia and Monastery of the Transfiguration, Kinaliada, are located in which city?
Answer: Istanbul