Constantinople, the new capital of the Roman Empire, was inaugurated on May 11, 330 and it is beyond any doubt that there was a suitable residence for the emperor and his court at that time. Like the emperors of the tetrarchy, beginning with Diocletian in Nicomedia, Constantine the Great (306-337) built the imperial palace next to the Hippodrome (or circus) to which it was connected by a spiral staircase leading to the imperial box (kathisma).1Although nothing remains of the Constantinian palace it is possible to locate it, on the basis of textual sources, to the two upper terraces in the Great Palace complex.2 The palace was entered from a colonnaded street, leading south of and parallel with Hagia Sophia, through a magnificent vestibule later called the Chalke that led to the area of imperial offices and barracks of emperor’s guards. To the west of this northernmost part of the palace was the Zeuxippos, the main public baths of Constantinople.
The core of the Constantinian palace comprising reception and dining halls as well as private apartments seems to have occupied roughly the area of the Sultan Ahmet Camii complex. This monumental core of the fourth-century palace is usually referred to as the Daphne in scholarly literature. However, it is not clear when this name was introduced and if it applied to the whole central area of the fourth-century palace. The earliest use of the name Daphne is attested in the sixth century: John Lydos uses it for the area where the halls of the Early Byzantine palace stood.3 On the other hand, the De Cerimoniis, a tenth-century compilation of the court ceremonies, applies this name only to the court south of the main reception halls of the Constantinian palace.4
2. The architecture of the palaceAlthough the imperial residence expanded gradually as far as the Sea of Marmara since the late seventh century, the later emperors erected their buildings also in the area of the Constantinian palace – the apsed hall with the mosaic peristyle (perhaps Herakleios´ work),13 the Justinianos (built by Justinian II) and several edifices by the emperors Theophilos (829-842) (the Sigma and Triconch being the most important among them) and Basil I (867-886).
Since no excavation has been carried out in the area of the palace of Constantine, all attemps to reconstruct its plan are based solely on textual evidence and must, therefore, remain hypothetical. However, Byzantine sources, notably the De Cerimoniis, give us an idea of the relative location of the main buildings and their mutual communication.5 The principal façade of the Constantinian Daphne palace faced north and was preceded by a large courtyard (the Tribunal). It is known that a flight of stairs ascended from the Tribunal to the main gate in the centre of the façade of the Daphne.6 The Consistorium was the main audience hall of the early palace and it seems to have flanked the east side of the Tribunal courtyard.7
Behind the Tribunal façade of the Daphne ran a corridor (so-called of Nineteen Couches) that connected two main ceremonial halls: the Triklinos of Nineteen Couches and the Augusteus. The Triklinos of Nineteen Couches was a long dining hall with nineteen apsidal , each probably containing a semicircular couch and table.8 The second hall, the Augusteus, served as a throne and crowning hall.9 Between the long propylaic corridor (Portico of Nineteen Couches) and the Augusteus was a (possibly semicircular) courtyard called the Onopous.10 Such a layout of the Daphne would have its closest parallel in the central part of the fourth-century luxury villa at Piazza Armerina on Sicily, where a large apsed hall and another, smaller apsed hall preceded by a semicircular portico were attached to a corridor that formed the one side of the central .
Private apartments of the early Great Palace seem to have been around another large courtyard (see note 4), south of the main palace halls, where the emperors could enjoy beautiful view of the Sea of Marmara and the Bosphorus. In this courtyard was also one of the most important churches in the Palace that was dedicated to St. Stephen. The church was erected by Theodosios II’s (408-540) sister Pulcheria in 421 and was used in imperial weddings until the ninth century.11 Constantine’s palace may also have contained an elaborate garden in the shape of a small hippodrome situated on the lower terrace of the palace (26 m above sea level), perhaps similar to the stadium garden in the Domus Augustana in Rome. This structure is called the Covered Hippodrome (hippodromos skepastos or simply hippodromos) in Byzantine sources.12
1. The direct connection between the palace and circus/hippodrome was a common feature of all Roman Imperial palaces in the main residences of the emperors. The palace-circus model goes back to Domitian’s Domus Augustana (first century) on the Palatine Hill in Rome which overlooked the Circus Maximus. The circus played an important role in the imperial ideology: the emperor used to appear before the public there as the divine ruler, winner of wars, and provider of peace, games and prosperity – see Humphrey, J. H., Roman Circuses. Arenas for Chariot Racing (London 1986), pp. 579-638; Heucke, C., Circus und Hippodrom als politischer Raum (Olms-Weidmann 1994). In Constantinople, after a new emperor had been crowned, he ascended to the kathisma and was acclaimed by the inhabitants.
2. For terracing see esp. Bolognesi, E., "The Great Palace Survey: The First Season (1992)," Araştırma Sonuçları Toplantısı 11 (1993), pp. 19-34.
3. John Lydos, De Mensibus, ed. R. Wünsch, Ioannis Lydi liber de mensibus (Leipzig 1898; repr. Stuttgart 1967), p. 163. According to the Patria Constantinopoleos, the name of this part of the Great Palace allegedly derived from a statue of the nymph Daphne that stood there – see Berger, A., Untersuchungen zu den Patria Konstantinupoleos (ΠΟΙΚΙΛΑ ΒΥΖΑΝΤΙΝΑ 8, Bonn 1988), p. 263.
4. Constantine Porphyrogenitus, De Cerimoniis, ed. J.J. Reiske Constantini Porphyrogeniti imperatoris de cerimoniis aulae Byzantinae I, (CSHB, Bonn 1829), ch. 39, p. 197 and appendix 507: In 829 the emperor Theophilos on his way from the Hippodrome to the later, medieval part of the Great Palace near the sea, passed through the gate beneath the kathisma and rode his horse through the Daphne, which seems to have been an open space (probably a courtyard) south of the representative halls of the early palace, to reach the Covered Hippodrome.
5. Constantine Porphyrogenitus, De Cerimoniis, ed. J.J. Reiske Constantini Porphyrogeniti imperatoris de cerimoniis aulae Byzantinae I, (CSHB, Bonn 1829), esp. ch. 38, 39, 40, 41, 43, 44.
6. The Tribunal is also mentioned as the Delphax in the fifth- and early sixth-century chapters of the De Cerimoniis. John of Antioch (sixth century) speaks of the delphikoi kiones (=columns from Delphi) in the stoa (portico) of the palace courtyard which may have given the name to this ceremonial space (Guilland R., Études topographiques de Constantinople byzantine 1 [Berlin - Amsterdam 1969], pp. 70-71). The Tribunal was used for various ceremonial purposes, especially when a large number of people was present: For example, acclamations of a new caesar and empress took place there in the presence of the army and state officials, cf. Constantine Porphyrogenitus, De Cerimoniis, ed. J.J. Reiske Constantini Porphyrogeniti imperatoris de cerimoniis aulae Byzantinae I (CSHB, Bonn 1829), ch. 40, p. 204f.; ch. 41, pp. 209-212; ch. 43, p. 218. Furthermore, members of the circus factions used to gather in the Tribunal for the audiences with the emperor until Herakleios´ reign (Parastaseis Syntomoi Chronikai 36, ed. Th. Preger, Patria Constantinopoleos I [Leipzig 1901; repr. New York 1975], p. 39.). Large courtyards for ceremonies and gatherings of a great number of people were a common feature of Roman imperial palaces and residences of provincial governors and high military officials (praetoria). The so-called Palace of Giants on the Athenian Agora and the military praetorium in Dura Europos on the Euphrates can be mentioned as good examples of such complexes, combining residential and official functions and comprising large peristyle forecourts – see Frantz, A., The Athenian Agora XXIV. Late Antiquity A.D. 267-700, (Princeton 1988), pp. 95-116; Downey, S.B., "The Palace of the Dux Ripae at Dura-Europos and ‘Palatial’ Architecture of Late Antiquity" in: Eius Virtutis Studiosi. Classical and Postclassical Studies in Memory of Frank Brown, Studies in the History of Art 43 (1993), pp. 182-198. The De Cerimoniis tells us that the emperor and empress used to appear to those gathered in the courtyard standing behind a railing on the top of the flight of stairs. The gate in the middle of the palace façade may have been preceded by a gabled porch which was common in the Roman palatial architecture. Taking this into account the porch (and the staircase in front of it) may have looked like that in Diocletian’s palace at Split, facing the so-called peristyle.
7. Guilland, R., Études topographiques de Constantinople byzantine 1 (Berlin - Amsterdam 1969), pp. 56-59; Bolognesi, E., ‘The Great Palace of Constantinople’ in: Jobst, W. - Kastler, R. – Scheibelreiter, V. (eds), Neue Forschungen und Restaurierungen im byzantinischen Kaiserpalast von Istanbul (Wien 1999), p. 12f.
8. The name of the hall is derived from the number of dining couches (gr. akkoubita). Such couches were usually semicircular in Late Antiquity (a couch of this type was often called a stibadium or sigma) and they carved along semicircular tables. The semicircular shape of couches in the Triklinos of Nineteen Couches is confirmed by the account of a banquet written by the Bishop Liutprand of Cremona who visited Constantinople in the tenth century (he also adds that guests used to recline during imperial banquets according to the ancient custom that had been long abandoned in the former Roman world). The Triklinos of Nineteen Couches belongs to the distinctive group of representative multi-apsed buildings known from the fourth century onwards, such as the triclinium in the House of Bacchus in North African Djemila (seven apses), the northern hall in the Palace of Antiochus in Istanbul (seven apses) or the early ninth-century Council Aula in the Lateran palace in Rome (eleven apses). The Triklinos of Nineteen Couches does not seem to have been vaulted because the emperor Constantine VII (913-959) is said to have replaced the old, rotten wooden coffered ceiling with a new one. For the Triklinos of Nineteen Couches see esp. Krautheimer, R., "Die Decanneacubita in Konstantinopel. Ein kleiner Beitrag zur Frage Rom und Byzanz," in Schumacher, W.N. (ed.), Tortulae. Studien zu altchristlichen un byzantinischen Monumenten (RömQSchr Suppl. 30), (Rom - Freiburg - Wien 1966), pp. 195-199.
9. For the Augustaion see Guilland, R., Études topographiques de Constantinople byzantine 1 (Berlin - Amsterdam 1969), pp. 81-86. Jonathan Bardill hypothetically identified the excavated apsed hall and the adjoining mosaic peristyle (the mosaics displayed partly in situ in Mosaik Müzesi), which he dates to the late sixth- or early seventh century, as the Augustaion assuming that the excavated building replaced the original Augustaion of the Constantinian Palace – Bardill, J., "The Great Palace of the Byzantine Emperors and the Walker Trust Excavations", Journal of Roman Archaeology 12 (1999), pp. 216-230 and Bardill, J., Brickstamps of Constantinople, 2 vols., (Oxford 2004), I, pp. 134-147.
10. The name of Onopous (also called the Onopodion) seems to have derived from the Greek words onos (ass, donkey) and pous (foot) which suggests that it was probably semicircular or horse-shoe shaped. The portico limiting this courtyard was known as the Chrysocheir (Golden Hand) – see Kostenec, J., "The Heart of the Empire: The Great Palace of the Byzantine Emperors Reconsidered", Dark, K.R. (ed.), Secular Buildings and the Archaeology of Everyday Life in the Byzantine Empire (Oxford 2004), pp. 4-13 and Kostenec, J., "Observations on the Great Palace at Constantinople: The Sanctuaries of the Archangel Michael, the Daphne Palace, and the Magnaura", Reading Medieval Studies 31 (2005), pp. 35-42. Such semicircular portico courtyards were popular in the fourth-and fifth-century palaces and examples of this layout were also excavated in Istanbul (Antiochus’ palace, hexagonal hall in Gülhane and the rotunda next to the Myrelaion/Bodrum Camii).
11. Holum, K.G. - Vikan, G., "The Trier Ivory, Adventus Ceremonial, and the Relics of St. Stephen", Dumbarton Oaks Papers 33 (1979), pp. 128-132; Janin, R., La géographie ecclesistique de l´empire byz. I: le siége de Constantinople et le patriarcat oecuménique III: les églises et les monastéries, (Paris 1969), p. 511f. On Imperial weddings in the Church of St. Stephen see Constantine Porphyrogenitus, De Cerimoniis, ed. J.J. Reiske Constantini Porphyrogeniti imperatoris de cerimoniis aulae Byzantinae I, (CSHB, Bonn 1829), ch. 39 and 41.
12. Guilland, R., Études topographiques de Constantinople byzantine 1 (Berlin - Amsterdam 1969), pp. 165-210; Piganiol, A., "La loge impériale de l´Hippodrome de Byzance et le probléme de l´Hippodrome Couvert," Byzantion 11 (1936), p. 387f.; Vogt, A., "L'hippodrome ‘couvert’," Echos d´Orient 37 (1938), pp. 23-35.
13. Dated by J. Bardill on the arhaeological evidence to the late sixth- or early seventh century (see note 8). For the dating of the apsed hall and the peristyle to the reign of Herakleios see: Trilling, J., "The Soul of the Empire: Style and Meaning in the Mosaic Pavement of the Imperial Palace in Constantinople," Dumbarton Oaks Papers 43 (1989), pp. 27-72; Kostenec, J., "The Heart of the Empire: The Great Palace of the Byzantine Emperors Reconsidered," in Dark, K.R. (ed.), Secular Buildings and the Archaeology of Everyday Life in the Byzantine Empire (Oxford 2004), pp. 15-18 and Kostenec, J., "Observations on the Great Palace at Constantinople: The Sanctuaries of the Archangel Michael, the Daphne Palace, and the Magnaura," Reading Medieval Studies 31 (2005), p. 47 note 4; Dark, K.R., "Roman Architecture in the Great Palace of the Byzantine Emperors at Constantinople During the Sixth to Ninth Centuries," Byzantion 77 (2007), pp. 87-105.