The (Greek, Ancient (to 1453);: ῥαίκτωρ, the Hellenized form of Latin: rector) was a high-ranking court position of the middle Byzantine Empire.
J. B. Bury assumed that the post was created either under Leo VI the Wise or his father Basil I the Macedonian, but Nicolas Oikonomides restored it in the text of the Taktikon Uspensky of . The title is also found in seals of the 7th and 8th centuries, but with a different sense; thus a " of Calabria" was the administrator of the local estates of the See of Rome in Calabria.
The Kletorologion of 899 includes the among the 'special dignities' . The exact functions of the office are not clear, but, as J. B. Bury wrote, they probably "consisted in exercising some authority over the Imperial household". Earlier authors suggested that the title was related, or even identical, to the later title of, but the theory was rejected by Rodolphe Guilland. His ceremony of appointment is recorded in Constantine VII's De Ceremoniis. The reports of the ambassador to the Byzantine court Liutprand of Cremona show the as playing an important role in court ceremonies under Constantine VII.
The post could be held by court eunuchs as well as clerics, even priests, but was also often combined with other high offices, such as or . In the lists of precedence to the imperial banquets of the 9th–10th centuries he occupied a very prominent place, coming right after the and before the and the . The title disappears from the sources after the reign of Constantine IX Monomachos .
At the same time, the title also appears as a family name: the and Michael Rhektor was a member of the regency council appointed on the death of Romanos II in 963, while under Nikephoros III a monk called Rhektor pretended to be Michael VII Doukas and tried to overthrow the emperor.
| Name | Tenure | Appointed by | Notes | Refs |
|---|---|---|---|---|
| John Lazares | 912–913 | Alexander | Raised to the post on the accession of Alexander, he became a member of the regency council for Constantine VII but was soon dismissed by Empress-regent Zoe Karbonopsina. | |
| John the Rhaiktor | Romanos I Lekapenos | A cleric, he was and of Romanos, he was forced to retire to a monastery. He led a diplomatic mission to Bulgaria, and was blinded and exiled along with others in 946 for plotting against Constantine VII. | ||
| Michael Lekapenos | after 945 | Constantine VII | Son of Romanos I's eldest son and co-emperor Christopher Lekapenos, according to Theophanes Continuatus he was named and by Constantine VII. | |
| Basil | John I Tzimiskes | Was instrumental in suppressing a coup attempt by Leo Phokas the Younger against Tzimiskes and arresting the ringleaders. Possibly to be identified with Basil Lekapenos. | ||
| Basil | Basil II | Recorded only in two acts of the Great Lavra monastery as and . | ||
| Niketas | (?) | unknown | Only mentioned briefly in the Peira of Eustathios Rhomaios. | |
| Sagmatas | later 11th century | unknown | Addressee of a letter of Michael Psellos, later apparently advanced to the posts of and . | |
| Nikephoros | Constantine IX Monomachos | A eunuch and former monk, he became a court favourite of Constantine IX, who named him and . Sent to command against the Pechenegs, he was heavily defeated in battle near the Iron Gates. | ||
. Nicolas Oikonomides . Les listes de préséance byzantines des IXe et Xe siècles . Paris . Editions du Centre national de la recherche scientifique . 1972 . French .