A detail from Andrea di Bartolo’s late 14th‑century panel painting shows St. Margaret of Castello. St. Margaret is a patron saint for people with vision impairment and disabilities. The tempera‑and‑gold artwork, created circa 1394–98, is housed in the Gallerie dell’Accademia in Venice. (Photo by Sailko, licensed under Creative Commons Attribution 3.0 Unported)