Santa Claus is generally depicted as a portly, joyous, white-bearded man—sometimes with spectacles—wearing a red coat with white fur collar and cuffs, white-fur-cuffed red trousers, a red hat with white fur and black leather belt and boots and who carries a bag full of gifts for children. This image became popular in the United States and Canada in the 19th century due to the significant influence of the 1823 poem "A Visit from St. Nicholas" and of caricaturist and political cartoonist Thomas Nast. This image has been maintained and reinforced through song, radio, television, children's books, films, and advertising.
Santa Claus is said to make lists of children throughout the world, categorizing them according to their behavior ("good" and "bad", or "naughty" and "nice") and to deliver presents, including toys, and candy to all of the well-behaved children in the world, and coal to all the misbehaved children, on the single night of Christmas Eve. He accomplishes this feat with the aid of his elves, who make the toys in his workshop at the North Pole, and his flying reindeer, who pull his sleigh. He is commonly portrayed as living at the North Pole, and often laughing in a way that sounds like "ho ho ho".
Saint Nicholas of Myra was a 4th-century Greek Christian bishop of Myra (now Demre) in Lycia, a province of the Byzantine Empire, now in Turkey. Nicholas was famous for his generous gifts to the poor, in particular presenting the three impoverished daughters of a pious Christian with dowries so that they would not have to become prostitutes. He was very religious from an early age and devoted his life entirely to Christianity. In continental Europe (more precisely the Netherlands, Belgium, Austria, the Czech Republic and Germany) he is usually portrayed as a bearded bishop in canonical robes.
The remains of Saint Nicholas are in Italy. In 1087, the Italian city of Bari mounted an expedition to locate the tomb of the Saint. The reliquary of St. Nicholas was conquered by Italian sailors and his relics were taken to Bari where they are kept to this day. A basilica was constructed the same year to store the loot and the area became a pilgrimage site for the devout. Sailors from Bari collected just half of Nicholas' skeleton, leaving all the minor fragments in the grave. These were collected by Venetian sailors during the First Crusade and taken to Venice, where a church to St. Nicholas, the patron of sailors, was built on the San Nicolò al Lido. This tradition was confirmed in two important scientific investigations of the relics in Bari and Venice, which revealed that the relics in the two Italian cities belong to the same skeleton. Saint Nicholas was later claimed as a patron saint of many diverse groups, from archers, sailors, and children to pawnbrokers. He is also the patron saint of both Amsterdam and Moscow.
During the Middle Ages, often on the evening before his name day of 6 December, children were bestowed gifts in his honour. This date was earlier than the original day of gifts for the children, which moved in the course of the Reformation and its opposition to the veneration of saints in many countries on the 24th and 25 December. So Saint Nicholas changed to Santa Claus. The custom of gifting to children at Christmas has been propagated by Martin Luther as an alternative to the previous very popular gift custom on St. Nicholas, to focus the interest of the children to Christ instead of the veneration of saints. Martin Luther first suggested the Christkind as the bringer of gifts. But Nicholas remained popular as gifts bearer for the people.