One of the most impressive manifestations of the majesty and the antiquity of the Byzantine Empire must have been the great series of imperial tombs in the mausoleums of Constantine and Justinian which were attached to the Church of the Holy Apostles in Constantinople. Beginning with the burial of Constantine the Great (d. 337), the mausoleums served as the resting-places of most of the emperors (often with members of their families) who reigned during the next seven centuries, the last emperor to be buried there being Constantine VIII (d. 1028). The mausoleums then became full, and the emperors began to be buried in other churches and monasteries in Constantinople, often in establishments which they themselves had founded. There are not many comparable series of royal burials, and the presence of these tombs, as a visible record of the greatness of Byzantium, was one reason why the Church of the Holy Apostles enjoyed a celebrity only second to that of St. Sophia.
The emperors, beginning with Constantine the Great, understood very well the importance of placing the imperial burials in a worthy setting. The significance of the burials is illustrated by a report of a speech of Leo V, the Armenian (813–820), in which Leo is supposed to have remarked that the orthodox emperors were all buried respectably at the Holy Apostles, while the others died in exile or on the field of battle. In reality most of the emperors who reigned before the time of Leo V were buried at the Holy Apostles, and nearly all of those who reigned between his time and the beginning of the eleventh century were buried there.