Patron of science; the blind, pilgrims, travelers, merchants, construction workers, stone carvers, painters, wallpaperers, plasterers, book printers, bookbinders, weavers, brush binders, hairdressers, bakers, fishermen, jewelers, bailiffs; against plague.
Ludwig is depicted in a royal regalia with a scepter, a crown of thorns and nails.
His feast day is August 25th.
