The Golden Legend says Eustace was a pagan cavalry officer to whom Christ appeared in the form of a deer with a crucifix between its antlers, as in the second picture at right. This led to his conversion, for which he was executed on the order of the Emperor Hadrian.
The deer and crucifix appear as St. Eustace's emblem in portraits such as the one at right and on the rooftop of his church in Rome.
That church also has a large painting of St. Eustace's martyrdom. He was burned alive inside a brazen bull.
In the 15th century Eustace was one of the 14 Holy Helpers of popular devotion.
Prepared in 2014 by Richard Stracke, Emeritus Professor of English, Augusta University, revised 2015-11-02.