Passage: John, the eldest son of King Manuel I to his second wife  Maria of Aragon, was born in Lisbon on 7 June 1502.  The event was marked by the presentation of Gil Vicente's Visitation Play or the Monologue of the Cowherd  in the queen's chamber. The young prince was sworn heir to the throne in 1503, the year his youngest sister, Isabella of Portugal, Empress Consort of the Holy Roman Empire between 1527 and 1538, was born. John was educated by notable scholars of the time, including the astrologer Tomás de Torres, Diogo de Ortiz, Bishop of Viseu, and Luís Teixeira Lobo, one of the first Portuguese Renaissance humanists, rector of the University of Siena  and Professor of Law at Ferrara . John's chronicler António de Castilho said that, "Dom João III faced problems easily, complementing his lack of culture with a practice formation that he always showed during his reign" . In 1514, he was given his own house, and a few years later began to help his father in administrative duties. At the age of sixteen, John was chosen to marry his first cousin, the 20-year-old Eleanor of Austria, eldest daughter of Philip the Handsome of Austria-Burgundy and Queen Joanna of Castile, but instead she married his widowed father Manuel. John took deep offence at this: his chroniclers say he became melancholic and was never quite the same. Some historians also claim this was one of the main reasons that John later became fervently religious, giving him name the Pious .
How many years after John was born was he sworn in? How many years after John was given his own house did he marry? How many years after John was sworn in did he marry? How many years it between when John was born and when he was given his own house? How many years old was JOhn when he was sworn heir to the throne? How many years old was John when he was given his first house? How many years old was John when he was given his house? How many years old was John when he was given his own house? How many years old was John when his sister Isabella was born? How many years older  much older was Johns wife compared to him? How many years was Isabella of Portugal the Empress Consort of the Holy Roman Empire? How many years was it between when John was born and when he was sworn heir to the throne? How many years was it between when John was born and when his sister was born? How many yeears was John's sister Empress Consort of the Holy Roman Empire? What year was Eleanor of Austria born? Who was Elanor of Austria's mother? Who was Eleanor of Austria's mother? Who was Isabella's brother? Who was John's dad? Who was born first, John or Maria of Aragon? what was the name of the Bishop that helped to educate Jogn at the time? who was the Portuguese humanist that helped to educate  John?