This alterpiece depicts Thecla praying on behalf of people stricken with a terrible illness. The painting was commissioned for a cathedral in the town of Este, Italy, which was decimated by the Great Plague of Milan in the early 17th century. The epidemic caused a considerable loss of life in the region.

Thecla is lightly haloed, drawing attention to the earnestness of her expression. The scene hints at violent movement, a race against death. Directly next to Thecla is a dead mother, her lifeless arm still cradling her child. Thecla's 1st century story endured for more than 1700 years, to bring comfort to people in the 18th century and beyond.

A first century martyr, Thecla's enduring story is on display in this 18th century painting by Tiepolo.