I was researching Saint Agatha (February 5th feast day) https://en.wikipedia.org/wiki/Agatha_of_Sicily , and I came across this paragraph at the bottom of a web page http://www.christianiconography.info/agatha.html :
"The Golden Legend's story of St. Lucy begins with a visit to the sepulchre of St. Agatha, who intercedes with Christ to heal Lucy's mother of a bloody flux. The Metropolitan Museum in New York has a painting of this episode by Giovanni di Bartolommeo Cristiani." - https://www.metmuseum.org/art/collection/search/436050
What is the Golden Legend ?
https://en.wikipedia.org/wiki/Golden_Legend
read the Golden Legend online -
http://catholicsaints.info/the-golden-legend-by-blessed-jacobus-de-voragine/
"Saint Agatha ... is one of seven women, ... along with the Blessed Virgin Mary, [who] are commemorated by name in the [Catholic] Canon of the Mass." - https://thecatholictravelguide.com/destinations/italy/sicily/catania-italy-cathedral-tomb-saint-agatha/