Calaxes was born as an illegitimate of Uriel Septim VII and an unknown woman, being the half-brother of the proper heirs Geldall, Enman, and Ebel Septim, as well as another illegitimate heir Martin Septim. Though Calaxes wasn't in the line of succession to the Imperial throne, he had been given Archbishopric of The One: a powerful position in the Imperial City, and indeed over all Tamriel where the Imperial Cult is followed.
Rumors began to spread that Calaxes believed that the Gods were angered by the state of current Empire and the Emperor himself. It was even said that Calaxes advocated full-scale rebellion to establish a theocracy over the Empire. Calaxes' relation with his father began to become very precarious.
One day, Calaxes mysteriously disappeared without leaving any trace. Some believe he was removed by the Imperial Guard as they saw him as a threat to the Emperor. It is suggested that the Lady Allena Benoch had something to do with his disappearance. By 3E 433, Uriel believed all his sons beside Martin were dead, implying Calaxes was indeed deceased. Whatever the case, his death was confirmed following the Oblivion Crisis, when the Septim Bloodline ended.
- The date of Calaxes' disappearance is recorded to be Sun's Dusk of 3E 498. However, that is impossible due to the fact that the date simply does not exist. 3E 433 is the last year of Third Era. Words and Philosophy, the book where he is mentioned, first appears in The Elder Scrolls III: Morrowind, which takes place in 3E 427. The proper date is likely 3E 398, with "498" being a typo.
- The Elder Scrolls III: Morrowind (Mentioned only)
- The Elder Scrolls IV: Oblivion (Mentioned only)
- The Elder Scrolls V: Skyrim (Mentioned only)