Detail from:
The Rout of San Romano

The mazzocchio, a wooden or wicker headdress, was a common article of male attire in Florence in the second and third quarters of the fifteenth century. Painted representations of the mazzocchio are seen in many of Uccello's paintings. By virtue of its form, which can be clearly determined in these paintings, its representation presented a constructional problem of special complexity, with which later perspective theorists also concerned themselves.

The elaborate system of projection can be reconstructed from incised lines on the original drawings, and shows the relevance of the methods and principals of the costruzione legittima.