Zeyrek Mosque, originally built as the Church of Christ Pantocrator, converted into a mosque by the Ottomans. The mosque still retains some traces of the Byzantine period as a whole,

Aqueduct of Valens, built by the Romans and fed the Roman cisterns bringing fresh water from the Belgrade Forest 23 km.,

Quranic School of the Fatih Mosque, located in the complex of the Fatih Mosque. 220 students who study at the school then become imams after 8 years,

Fatih Mosque, built after the conquest of Istanbul, one of the largest and most beautiful mosques in the city,

Greek School in the Greek district of Fener also known as the Red School, built in 19th century. It had 700 Greek allies. Still active in the Fener district, not accessible to the visitors, so the visit from outside.

Greek Orthodox Patriarchate, before the Great Schism of the church in 1054, one of the five main seats of Christianity established since the first councils, from the council of Chalcedon in 451 the patriarchate of Constantinople. In hierarchical order it was the second after Rome, preceding Antioch, Alexandria and Jerusalem.

Iron Church (San Stefano), built entirely of iron in the 19th century by the Bulgarian community on the land filled on the Golden Horn,

Balat district, known as the Jewish quarter where the Jews of Istanbul settled from the 17th century,

Church of San Salvatore in Chora, built as a church with the name of San Salvatore in Chora, converted into a mosque in 1511, nowadays famous as a museum of mosaics,

The City Walls of Constantinople, built at the behest of the Roman Emperor Theodosius in the 5th century. They still surround the old Constantinople for 21 km.