Constantine Lardys was one of the leading members of the Byzantine Senate and a patrikios. He held the powerful post of praetorian prefect of the East some time during the latter part of Maurice's reign, although by 602 he held the post of curator of the palace of Hormisdas (curator domus divinae) and the extensive imperial estates attached to it. Constantine's tenure as praetorian prefect was unpopular due to the stringent financial policies pursued by Maurice.
Constantine played an important role in the turmoil that ended Maurice's reign in 602, brought about by the mutiny of the Danubian army. The already tense domestic situation was exacerbated when Constantine incurred the hostility of the influential Green racing faction, which led to the Greens protesting in the Hippodrome of Constantinople and to subsequent riots against Maurice, during which Constantine's house was burned down.
On the day after the riots, 22 November, Maurice, with his family and closest associates fled the capital before the advancing rebel army under Phocas, and crossed over to Chalcedon. In a bid to secure the support of the Persian shah Khosrau II (r. 590–628), Maurice dispatched his eldest son and co-emperor, Theodosius, to the East, and sent Constantine Lardys to accompany him. They were soon recalled, however, and on their return fell into the hands of Phocas's men and were executed at Chalcedon, a few days after the execution of Maurice and his other sons.
- The sobriquet is probably connected to lard; it was apparently given by the people, although the reason remains unknown. (Martindale, Jones & Morris 1992, p. 347.)
- Martindale, Jones & Morris 1992, pp. 347–348.
- Whitby 1988, p. 25.
- Martindale, Jones & Morris 1992, p. 348.
- Whitby 1988, pp. 25–26.
- Martindale, Jones & Morris 1992, pp. 348, 1293–1294; Whitby 1988, p. 26.
- Martindale, John Robert; Jones, Arnold Hugh Martin; Morris, J., eds. (1992). The Prosopography of the Later Roman Empire. III: A.D. 527–641. Cambridge, United Kingdom: Cambridge University Press. ISBN 978-0-521-20160-5.
- Whitby, Michael (1988). The Emperor Maurice and his Historian – Theophylact Simocatta on Persian and Balkan Warfare. Oxford, United Kingdom: Oxford University Press. ISBN 0-19-822945-3.