"Quirinus (Croatian: Kvirin) (died 309 AD) is venerated as an early bishop of Sescia, now Sisak in Croatia. He is mentioned by Eusebius of Caesarea.
A Passio, considered unreliable, states that Quirinus was killed during the persecutions of Diocletian after being arrested in 309. Quirinus had attempted to flee but was imprisoned. He managed to convert his jailer, named Marcellus, to Christianity. After three days, the governor of Pannonia Prima, Amantius, ordered him taken to Sabaria (present-day Szombathely, Hungary), where after attempting to make Quirinus abjure his faith, he had the bishop thrown into the local Gyöngyös River with a millstone around his neck." - (en.wikipedia.org 19.11.2023)
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