Istanbul 4th Vakıf Han

The Tomb of Abdul Hamid I (Turkish: I. Abdülhamid Türbesi) is the final resting place of Ottoman Sultan Abdul Hamid I located at Fatih in Istanbul, Turkey.

The Istanbul Postal Museum, aka PTT Museum Istanbul (Turkish: PTT İstanbul Müzesi), is a postal museum dedicated to the historical development of mail and telecommunication services in the Ottoman Empire and Turkey, exhibiting related equipment and instruments as well as a collection of postage stamps. It was established in 2000 by the Turkish Post, and is situated inside the Grand Post Office building at Sirkeci quarter of Fatih district in Istanbul, Turkey.

The Istanbul Grand Post Office (Turkish: Büyük Postane), or Istanbul Main Post Office, is an office building for postal services located in the Sirkeci neighborhood of the Eminönü quarter within the Fatih district of Istanbul, Turkey. It was designed by architect Vedat Tek in First Turkish National architectural style and was constructed between 1905 and 1909. The four-story building houses a post office, the Sirkeci Post Office (Turkish: Sirkeci PTT Merkezi), office space for regional administration and also since 2000 the Istanbul Postal Museum (Turkish: PTT İstanbul Müzesi). It is Turkey's largest post office building.

The Neorion Harbour (Greek: Λιμὴν τοῦ Νεωρίου or Λιμὴν τῶν Νεωρίων) was a harbour in the city of Constantinople, active from the foundation of the city in the 4th century until the late Ottoman period. It was the first port to be built in Constantinople after its re-foundation by Constantine the Great, and the second in the area after the Prosphorion, which was the port of ancient Byzantium.

Sirkeci (pronounced [ˈsiɾkedʒi]) is a neighborhood in the Eminönü quarter of the Fatih district in Istanbul, Turkey. The neighborhood borders to the north the mouth of the Golden Horn, to the west the neighborhood of Bahçekapı, to the east the Topkapı Palace area, and to the south the Cağaloğlu neighborhood. It hosts the Sirkeci railway station, the easternmost terminus of the Orient Express, a historic long-distance passenger train service in Europe that operated between Paris and Istanbul in the period between 1883 and 2009.The neighborhood consists mostly of commercial and tourist-oriented buildings. A combination of small shops, hans (larger workshops) and offices intermingle with boutique hotels, traditional Turkish restaurants, Turkish and foreign-language bookstores, and tourist offices. In the Byzantine period, the area was known as Prosphorion (Ancient Greek: Προσφόριον).

The Tomb of Turhan Sultan (Turkish: Turhan Sultan Türbesi) is the mausoleum of five Ottoman sultans, located at Fatih in Istanbul, Turkey. It was built in 1663 for Turhan Sultan, chief queen consort of Sultan Ibrahim and mother of Sultan Mehmed IV.

Rüstem Pasha Medrese (Turkish: Rüstem Paşa Medresesi) is a former medrese, located in Fatih district of Istanbul, Turkey. It was commissioned by Ottoman statesman and grand vizier Rüstem Pasha, and built by court architect Mimar Sinan in 1551.

The New Mosque (Turkish: Yeni Cami, pronounced [jeni dʒami], originally named the Valide Sultan Mosque, Turkish: Valide Sultan Camii) and later New Valide Sultan Mosque (Turkish: Yeni Valide Sultan Camii) after its partial reconstruction and completion between 1660 and 1665, is an Ottoman imperial mosque located in the Eminönü quarter of Istanbul, Turkey. It is situated on the Golden Horn, at the southern end of the Galata Bridge. The mosque is an example of the Sultanate of Women period in Ottoman Empire.

Cağaloğlu is a quarter located in the Fatih district of Istanbul, Turkey. Much of the publishing industry in Istanbul is located in Cağaloğlu. It is also famous for its ancient hamam, or Turkish bath, known as the Cağaloğlu Hamam.

İşbank Museum is a bank museum in İstanbul, Turkey

The sack of Constantinople occurred in April 1204 and marked the culmination of the Fourth Crusade. Crusader armies captured, looted, and destroyed parts of Constantinople, then the capital of the Byzantine Empire. After the capture of the city, the Latin Empire (known to the Byzantines as the Frankokratia or the Latin Occupation) was established and Baldwin of Flanders was crowned Emperor Baldwin I of Constantinople in the Hagia Sophia. After the city's sacking, most of the Byzantine Empire's territories were divided up among the Crusaders. Byzantine aristocrats also established a number of small independent splinter states, one of them being the Empire of Nicaea, which would eventually recapture Constantinople in 1261 and proclaim the reinstatement of the Empire. However, the restored Empire never managed to reclaim its former territorial or economic strength, and eventually fell to the rising Ottoman Empire in the 1453 Siege of Constantinople. The sack of Constantinople is a major turning point in medieval history. The Crusaders' decision to attack the world's largest Christian city was unprecedented and immediately controversial. Reports of Crusader looting and brutality scandalised and horrified the Orthodox world; relations between the Catholic and Orthodox churches were catastrophically wounded for many centuries afterwards, and would not be substantially repaired until modern times. The Byzantine Empire was left much poorer, smaller, and ultimately less able to defend itself against the Seljuk and Ottoman conquests that followed; the actions of the Crusaders thus directly accelerated the collapse of Christendom in the east, and in the long run helped facilitate the later Ottoman Conquests of Southeastern Europe.

The siege of Constantinople in 1203 was a Crusader siege of the capital of the Byzantine Empire, in support of the deposed emperor Isaac II Angelos and his son Alexios IV Angelos. It marked the main outcome of the Fourth Crusade.