Hosanna

Blessed Osanna Andreasi of Mantua (also Hosanna and Andreassi) was a Dominican tertiary, stigmatic, and mystic.

A legend states that Osanna, like Saint Catherine, miraculously learned to read and write. One day she saw a piece of paper with two words and said, "Those words are 'Jesus' and 'Mary.'" Allegedly, from that time on, anything relating to the spiritual was within her grasp.

Catherine's letters are considered one of the great works of early Tuscan literature. More than 300 letters have survived. In her letters to the Pope, she often referred to him affectionately as "Papa" or "Daddy" ("Babbo" in Italian). Her major work is the Dialogue of divine providence.
Catherine's body is currently interred in Rome, in the basilica Santa Maria sopra Minerva near the Pantheon. Her head and right thumb are in Siena, and her foot in Venice.

Young legends tell that the Rosette stone was deciphered when the names of Ptolemaius and Kleopatra became apparent ... couldn't find a detailed hint :
In 1814, the Briton Thomas Young finished translating the enchorial (demotic) text[of the Rosetta stone], and began work on the hieroglyphic alphabet. From 1822 to 1824, Jean-François Champollion greatly expanded on this work, and he is known as the translator of the Rosetta Stone. Champollion could read both Greek and Coptic, and figured out what the seven Demotic signs in Coptic were. By looking at how these signs were used in Coptic, he worked out what they meant. Then he traced the Demotic signs back to hieroglyphic signs. By working out what some hieroglyphs stood for, he made educated guesses about what the other hieroglyphs meant.