Castor and Pollux Castor and Pollux Castor and Pollux (or in Greek, Polydeuces) were twin half-brothers in Greek and Roman mythology, known together as the Dioscuri. Their mother was Leda, but they had different fathers; Castor was the mortal son of Tyndareus, the king of Sparta, while Pollux was the divine son of Zeus, who seduced Leda in the guise of a swan. Though accounts of their birth are varied, they are sometimes said to have been born from an egg, along with their twin sisters Helen of Troy and Clytemnestra. In Latin the twins are also known as the Gemini (literally "twins")
Leda and the Swan (Leonardo) on wood, 128 x 106 cm). In 1508 Leonardo painted a different composition of the subject. The picture known as "Leda and the Swan" depicted a nude standing Leda cuddling the swan, with the two sets of infant twins, and their huge broken egg-shells. The original of this is lost, probably deliberately destroyed, and was last recorded in the French royal Château de Fontainebleau in 1625 by Cassiano dal Pozzo: "A standing figure of Leda almost entirely naked, with the swan at her and two eggs, from whose broken shells come forth four babies, This work, although somewhat dry in