He was canonized in 1234 by Gregory IX., who, as Cardinal Ugolino, had been the great friend and supporter both of Dominic and of Francis of Assisi.
He read considerably, wrote abundantly, thought actively if not widely, and came to know beasts, birds and fishes with an intimacy more extraordinary than was the case with St Francis of Assisi.
There is no need to doubt the reality of Catherine's exaltation, but it should be remembered that she and her circle were Dominicans, and that the stigmata of St Francis of Assisi were considered the crowning glory of the saint, and hitherto the exclusive boast of the Franciscans.
The last of her band, Tommaso Caffarini, died in 1 434, but the work was taken up, though in other shape, by Savonarola, between Francis of Assisi and whom Catherine forms the connecting link.
He canonized Saints Elizabeth of Thuringia, Dominic, Anthony of Padua and Francis of Assisi.