Saint Parthenius was a 3rd-century Christian martyr born in Armenia who later lived in Rome. Serving as a eunuch in the imperial palace of Emperor Decius, he and his brother Calocerus faced accusations of embezzlement. However, they chose to defend their Christian faith during their trial, which led to their death sentence. Following his execution in Rome, he was interred within the catacombs of Saint Callixtus.