Girolamo Citolanzo
The Martyrdom of St. Catherine of Alexandria

Oil on canvas
Basilica of Santa Maria Maggiore, Rome

Unusually, the artist has portrayed the Trinity witnessing St. Catherine's martyrdom.

The artist's name was provided by a label at the site. I have been unable to find any other information on any artists of that name.

More of St. Catherine of Alexandria

Photographed at the basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.