context: István is the eldest son of Géza II from Hungary and his wife Euphrosyne from Kiev. [1] [2] He was born in the summer of 1147 when the French crusaders marched through Hungary to the Holy Land. [1] King Louis VII of France sponsored his baptism. [2] A woman named Lady Margaret, writing her last will in 1152, stated that "King Géza ruled with his son, Duke of István" that year, indicating that the King had officially nominated his son István as his heir. [1] [3] However, his position as a substitute for his father remained unsafe, especially after his two uncle, István and László, left Hungary in the late 1150s. [1] [4] They would live in the palace of the Byzantine Emperor Manouel I Komnenos in Constantinople. [4] [5] Géza II gave Dalmasia, Croatia and Sirmium to his younger son, Béla as apanase shortly before his death. [4] [3]
question: When was István III born?
answers.text: summer of 1147