Kalliopi was a third-century Christian martyr who lived during the Roman Empire. She is remembered for her steadfastness during the persecutions initiated by Emperor Decius. After refusing to marry a pagan suitor, she faced legal accusations of treason and mockery of the state religion. Despite facing intense physical torture, including branding and flogging, she refused to renounce her faith. She was eventually executed by beheading in 250.