Nicholas was dedicated to helping the poor throughout his life, famously (and anonymously) paying for the dowries of impoverished girls. His reputation as a secret gift-giver around town grew with time, and he became known especially for depositing coins or treats in the shoes of children who would place them out for that very purpose, sometimes in exchange for carrots or hay left for his horses. Nicholas is traditionally depicted wearing a red bishop's cloak, and was often helped by a small orphan boy, according to some legends.
Neptune was supposedly discovered in 1846 by Johann Gottfried Galle using calculations by Urbain Le Verrier and John Couch Adams, making it a joint British-French-German discovery.
But these astronomers were not the first to observe Neptune. That honor goes to the famous Italian astronomer Galileo Galilei.
While sketching the moons of Jupiter with his newly discovered telescope, Galileo twice drew Neptune, which happened to be in conjunction with Jupiter in early 1613. It's usually said that Galileo mistook Neptune for a star because of its slow movement.