Irene of Tomar was a 7th-century Christian martyr from the Visigothic Kingdom in what is now Portugal. Born into an influential family in Nabância, she lived a secluded life focused on religious devotion, attending Mass and praying at the sanctuary of Saint Peter. According to tradition, she was a religious sister who remained celibate to serve God. Her life ended prematurely in Santarém after she was falsely accused of infidelity by her tutor, leading to her violent death at the hands of a hired assassin.