Free Walking Sightseeing Tour #10 in İstanbul, Turkey

Fenâri Îsâ Mosque, known in Byzantine times as the Lips Monastery, is a mosque in Istanbul, made of two former Eastern Orthodox churches.

Wikipedia: Fenari Isa Mosque (EN)

İskender Pasha Mosque, a.k.a. Terkim Masjid is a historic mosque located in Fatih district in Istanbul, Turkey.

Wikipedia: İskender Pasha Mosque, Fatih (EN)

The Column of Marcian is a Roman honorific column erected in Constantinople by the praefectus urbi Tatianus and dedicated to the Emperor Marcian (450–57). It is located in the present-day Fatih district of Istanbul. The column is not documented in any late Roman or Byzantine source and its history has to be inferred from its location, style and dedicatory inscription.

Wikipedia: Column of Marcian (EN)

The Eski Imaret Mosque is a former Byzantine church converted into a mosque by the Ottomans. The church has traditionally been identified as belonging to the Monastery of Christ Pantepoptes, meaning "Christ the all-seeing". It is the only documented 11th-century church in Istanbul which survives intact, and represents a key monument of middle Byzantine architecture. Despite that, it remains among the least studied buildings in the city.

Wikipedia: Eski Imaret Mosque (EN)

Şeyh Süleyman Mosque is a mosque in Istanbul converted from a former Byzantine building which was part of the Eastern Orthodox Pantokrator Monastery. Its usage during the Byzantine era is unclear. The small building is a minor example of architecture of the Byzantine middle period in Constantinople.

Wikipedia: Şeyh Süleyman Mosque (EN)

The Church of St. Polyeuctus was an ancient Byzantine church in Constantinople 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.

Wikipedia: Church of St. Polyeuctus (EN)

The Burmalı Mosque is a 16th-century Ottoman mosque in Şarachane park, Fatih district, Istanbul, Turkey.

Wikipedia: Mosque with the Spiral Minaret (EN)

The Tahtakale Hamam is a historic Ottoman hammam building in Istanbul, Turkey, close to the Rüstem Pasha Mosque in the Tahtakale neighbourhood, between the Grand Bazaar and Eminönü. Built during the reign of Sultan Mehmet II, it is one of the oldest surviving bathhouses in the city. After having suffered significant damage while being used as a storage depot in the 20th century, the building was restored in the late 1980s and now serves as a local shopping centre and cafe.

Wikipedia: Tahtakale Hamam (EN)

The Ashkenazi Synagogue is an Ashkenazi synagogue located near the Galata Tower in Karaköy neighborhood of Beyoğlu in Istanbul, Turkey. It is the only currently active Ashkenazi synagogue in Istanbul open to visits and prayers. The synagogue was founded by Jews of Austrian origin in 1900. It is also the last remaining synagogue from a total of three built by Ashkenazim, as the population of Ashkenazi Jews accounts for 4 percent of the total Jewish population of Turkey. Visits to the synagogue can be made during weekday mornings and for Shabbat services on Saturday mornings.

Wikipedia: Ashkenazi Synagogue of Istanbul (EN)

Saint Benoit is a Roman Catholic Church in Istanbul, Turkey, important for historical reasons. Established in 1427, the shrine is the oldest Catholic church of Istanbul still in use.

Wikipedia: Church of Saint Benoit, Istanbul (EN)

The Saint Gregory the Illuminator Church of Galata is the oldest extant Armenian Apostolic church in Istanbul. It was built in the late 14th century, in the Genoan period, shortly before the fall of Constantinople to the Ottomans. Located in Galata (Karaköy), it is the city's only church built in the traditional style of the Armenian church architecture—namely with a dome with a conical roof.

Wikipedia: Saint Gregory the Illuminator Church of Galata (EN)

The Kılıç Ali Pasha Mosque is a mosque at the heart of a complex designed and built between 1580 and 1587 by Mimar Sinan, who at the time was in his 90s. The mosque itself was constructed in 1578–1580.

Wikipedia: Kılıç Ali Pasha Complex (EN)

Nusretiye Mosque is an ornate mosque located in Tophane district of Beyoğlu, Istanbul, Turkey. It was built in 1823–1826 by Sultan Mahmud II.

Wikipedia: Nusretiye Mosque (EN)

The Orhan Kemal Literature Museum is a literary museum and archive in Istanbul, Turkey dedicated to Turkish literature, and named after novelist Orhan Kemal (1914–1970).

Wikipedia: Orhan Kemal Literature Museum (EN), Website

Saint Mary Draperis is a Catholic church in Istanbul, important for historical reasons. Established in 1584, the church is one of the most ancient Catholic parishes of Istanbul.

Wikipedia: Church of St. Mary Draperis, Istanbul (EN)

The Crimea Memorial Church, also known as Christ Church, is a Church of England church in the Beyoglu - Taksim district of Istanbul, Turkey.

Wikipedia: Crimea Memorial Church (EN)