Pieter van Lint
The True Cross Heals the Sick Man

Circa 1633-1640
Fresco
Basilica of Santa Maria del Popolo

According to the legend, St. Helena (in blue) unearthed three crosses. When the true cross touched the sick man, he recovered immediately.

More of St. Helena

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