The calamities alluded to by Vespasiano may be briefly told. Palla degli Strozzi, better fitted by nature for study than for party warfare, was one of the richest of the merchant princes of Florence. In the _catasto_ of 1427 his property was valued at one-fifth more than that returned by Giovanni, then the chief of the Medicean family; and the extraordinary tax (_gravezza_) imposed upon it reached the sum of 800 florins.[129] During the conflict for power carried on between the Albizzi and the Medici he strove to preserve a neutral attitude; but after Cosimo's return from exile, in 1434, the presence of so powerful and rich a leader in the State seemed dangerous to the Medicean party. It was their policy to annihilate all greatness but their own, and to reduce the Florentines to slavery by creating a body of dependents and allies whose interests should be bound up with their own supremacy.[130] Palla degli Strozzi was accordingly banished to Padua for ten years, nor, at the expiration of this period, was he suffered to return to Florence. He died in exile, separated from his children, who shared the same fate in other parts of Italy, while Florence lost the services of the most enlightened of her sons.[131] Amid the many tribulations of his latter years Palla continued to derive comfort from study. John Argyropoulos was his guest at Padua, where the collection of books and the cultivation of Greek learning went on with no less vigour than at Florence. [Footnote 129: _Ibid._ p. 276.] [Footnote 130: See Von Reumont, vol. i. pp. 147-153, for the cruel treatment of the Albizzi and other leading citizens.] [Footnote 131: See Vespasiano, pp. 283-287.]