Blue Mosque, Istanbul

The Great Palace of Constantinople (Greek: Μέγα Παλάτιον, Méga Palátion; Latin: Palatium Magnum, Turkish: Büyük Saray), also known as the Sacred Palace (Greek: Ἱερὸν Παλάτιον, Hieròn Palátion; Latin: Sacrum Palatium), was the large Imperial Byzantine palace complex located in the south-eastern end of the peninsula now known as Old Istanbul (formerly Constantinople), in modern Turkey. It served as the main Imperial residence of the Eastern Roman or Byzantine emperors until 1081 and was the centre of imperial administration for over 690 years. Only a few remnants and fragments of its foundations have survived into the present day.

The Chalke Gate (Greek: Χαλκῆ Πύλη), was the main ceremonial entrance (vestibule) to the Great Palace of Constantinople in the Byzantine period. The name, which means "the Bronze Gate", was given to it either because of the bronze portals or from the gilded bronze tiles used in its roof. The interior was lavishly decorated with marble and mosaics, and the exterior façade featured a number of statues. Most prominent was an icon of Christ which became a major iconodule symbol during the Byzantine Iconoclasm, and a chapel dedicated to the Christ Chalkites was erected in the 10th century next to the gate. The gate itself seems to have been demolished in the 13th century, but the chapel survived until the early 19th century.

The Church of the Virgin of the Pharos (Greek: Θεοτόκος τοῦ Φάρου, Theotokos tou Pharou) was a Byzantine chapel built in the southern part of the Great Palace of Constantinople, and named after the tower of the lighthouse (pharos) that stood next to it. It housed one of the most important collections of Christian relics in the city, and functioned as the chief palatine chapel of the Byzantine emperors.

The Great Palace Mosaic Museum (Turkish: Büyük Saray Mozaikleri Müzesi), is located close to Sultanahmet Square in Istanbul, Turkey, at Arasta Bazaar. The museum houses mosaics from the Byzantine period, unearthed at the site of the Great Palace of Constantinople.

The Palace of Daphne (Greek: Δάφνη) was one of the major wings of the Great Palace of Constantinople, the capital of the Byzantine Empire (modern Istanbul, Turkey). According to George Codinus, it was named after a statue of the nymph Daphne, brought from Rome. The exact layout and appearance of the palace is unclear, since it lies under the Sultan Ahmed Mosque, and the only surviving evidence comes from literary sources. Jonathan Bardill, however, has suggested that the peristyle with mosaics adjoining an apsed hall, excavated by the Walker Trust excavations in 1935-7 and 1952-4, could be the Augusteus of the Daphne Palace.

Sultanahmet Square (Turkish: Sultanahmet Meydanı), or the Hippodrome of Constantinople (Greek: Ἱππόδρομος τῆς Κωνσταντινουπόλεως, romanized: Hippódromos tēs Kōnstantinoupóleōs; Latin: Circus Maximus Constantinopolitanus; Turkish: Hipodrom) is a square in Istanbul, Turkey. Previously, it was a circus that was the sporting and social centre of Constantinople, capital of the Byzantine Empire. The word hippodrome comes from the Greek hippos (ἵππος), horse, and dromos (δρόμος), path or way. For this reason, it is sometimes also called Atmeydanı ("Horse Square") in Turkish. Horse racing and chariot racing were popular pastimes in the ancient world and hippodromes were common features of Greek cities in the Hellenistic, Roman and Byzantine eras.

The Baths of Zeuxippus were popular public baths in the city of Constantinople, the capital of the Byzantine Empire. They were built between 100 and 200, destroyed by the Nika revolt of 532 and then rebuilt several years later. They were so called because they were built upon the site where a Temple of Zeus (Jupiter) had formerly existed. They were built around 500 yards south of the much older baths of Achilles of the earlier Greek Acropolis in Byzantion. The baths were famed primarily for the many statues that were built within, and the famous people they each represented. However, they were later used for military purposes, during the seventh century. Excavations of the site and the Baths were made in 1928.

The Obelisk of Theodosius (Turkish: Dikilitaş) is the Ancient Egyptian obelisk of Pharaoh Thutmose III re-erected in the Hippodrome of Constantinople (known today as At Meydanı or Sultanahmet Meydanı, in the modern city of Istanbul, Turkey) by the Roman emperor Theodosius I in the 4th century AD.

On 12 January 2016, a suicide attack in Istanbul's historic Sultanahmet district killed 13 people, all foreigners, and injured 14 others. The attack occurred at 10:20 local time, near the Blue Mosque and the Hagia Sophia, an area popular among tourists. The attacker was Nabil Fadli (Arabic: نبيل فضلي), a Syrian member of the Islamic State.

The German Fountain (Turkish: Alman Çeşmesi German: Deutscher Brunnen) is a gazebo styled fountain in the northern end of old hippodrome (Sultanahmet Square), Istanbul, Turkey and across from the Mausoleum of Sultan Ahmed I. It was constructed to commemorate the second anniversary of German Emperor Wilhelm II's visit to Istanbul in 1898. It was built in Germany, then transported piece by piece and assembled in its current site in 1900. The neo-Byzantine style fountain's octagonal dome has eight marble columns, and dome's interior is covered with golden mosaics.

The Serpent Column (Ancient Greek: Τρικάρηνος Ὄφις Τrikarenos Οphis "Three-headed Serpent"; Turkish: Yılanlı Sütun "Serpentine Column"), also known as the Serpentine Column, Plataean Tripod or Delphi Tripod, is an ancient bronze column at the Hippodrome of Constantinople (known as Atmeydanı "Horse Square" in the Ottoman period) in what is now Istanbul, Turkey. It is part of an ancient Greek sacrificial tripod, originally in Delphi and relocated to Constantinople by Constantine the Great in 324. It was built to commemorate the Greeks who fought and defeated the Persian Empire at the Battle of Plataea (479 BC). The serpent heads of the 8-metre (26 ft) high column remained intact until the end of the 17th century (one is on display at the nearby Istanbul Archaeology Museums).

The Walled Obelisk or Masonry Obelisk (Turkish: Örme Dikilitaş) is a Roman monument in the form of an obelisk in the former Hippodrome of Constantinople, now Sultanahmet Square in Istanbul, Turkey. It is situated west of the Sultan Ahmed Mosque, at the southern end of the ancient chariot-racing track of Constantinople's central barrier, beside the Obelisk of Theodosius and the Serpentine Column. Its original construction date in late antiquity is unknown, but it is sometimes named Constantine's Obelisk (Konstantin Dikilitaşı) after the inscription added by the Roman emperor Constantine VII Porphyrogenitus, who repaired it in the 10th century.