Saint Isidore of Seville was Archbishop of Seville for more than three decades and is considered, as the historian Montalembert put it in an oft-quoted phrase, "le dernier savant du monde ancien".Indeed, all the later medieval history-writing of Hispania were based on his histories.At a time of disintegration of classical culture, and aristocratic violence and illiteracy, he was involved in the conversion of the royal Visigothic Arians to Catholicism, both assisting his brother Leander of Seville, and continuing after his brother's death. Like Leander, he played a prominent role in the Councils of Toledo and Seville. The Visigothic legislation which resulted from these councils is regarded by modern historians as exercising an important influence on the beginnings of representative government.