What High Middle Ages institution did the archbishop of Tyre attend for twenty years?
William of Tyre: William of Tyre (Latin: "Willelmus Tyrensis" ; c. 1130 – 29 September 1186) was a medieval prelate and chronicler. William of Tyre:  He grew up in Jerusalem at the height of the Kingdom of Jerusalem, which had been established in 1099 after the First Crusade, and he spent twenty years studying the liberal arts and canon law in the universities of Europe. Medieval university: A medieval university is a corporation organized during the High Middle Ages for the purposes of higher learning.
A medieval university