The National Gallery in Dublin holds a painting attributed to Paolo Uccello (1397 - 1475). Stylistically it is close to frescoes in the Chapel of Our Lady of Assumption in Prato Cathedral, whose attribution to Uccello is equally controversial. Other paintings in this group are Santa Monaca with Two Children, the Crucifixion in the Thyssen Collection, and a predella that belonged to an altarpiece that has been lost (but was originally painted for the church of San Bartolomeo at Quarate) which is stylistically close to the Prato frescoes.

Some scholars do not believe that Uccello ever worked in the chapel in Prato; according to them, these contested works can be given to a painter very close to him, perhaps a pupil, known variously as the Master of Prato, the Master of Karlsruhe or the Master of Quarata. The frescoes show the interest in narrative, lively colours and description of details which is typical of Uccello's production in the years 1435-40. The same can be said of the stories from the lives of Hermit Saints in the upper loggia of the cloister of San Miniato al Monte (today no more than a group of faded and almost undecipherable images).

In the extravagant choice of colours that characterises these works, Uccello appears to have given his fantasy free rein; in fact, as Vasari noted, "he did not pay much attention to the rule of consistency in colour, as was usual in the painting of stories; for he made the fields blue, the cities red, and the buildings the colour he felt like."