Ansanus was a 4th-century Christian martyr and a member of the noble Anician family from Rome. Born in 284, he was raised in secret as a Christian by his nurse, Maxima. During the persecutions under Emperor Diocletian, he publicly declared his faith at the age of nineteen. Known as the Apostle of Siena, he traveled to the region to spread the Gospel, eventually facing execution in Monteaperti after surviving various tortures.
Life and martyrdom

After being secretly baptized as a child, Ansanus preached in Bagnoregio. Legend suggests he was imprisoned there before being moved to Siena. During his persecution, he reportedly survived being scourged and thrown into boiling oil. Despite these trials, he successfully converted many people to Christianity in Siena. His life ended when he was decapitated following orders from the Roman Emperor.
Veneration
He is honored as a patron saint of Siena. His religious significance is preserved in art, most notably through his depiction in the Maestà by Duccio. He is commemorated in the Catholic and Orthodox traditions, with his feast day observed on 1 December.
