This polyptych, commissoned for the convent of Santa Caterina in Pisa and now in the Museum of San Matteo, is without doubt the most important of Simone's signed paintings: forty-three busts of apostles, martyrs, bishops and prophets are placed in the cusps and under the trefoiled arches of the panels. The altarpiece consists of seven elements, each one in three parts: a cusp, a smaller panel divided into two sections, and a larger panel depicting a single saint. There is also a predella consisting of seven smaller size panels.

Preview	Picture Data	File Info	Comment
	Polyptych of Santa Caterina (Pisa Polyptych) 1319 Tempera on wood, 195 x 340 cm Museo Nazionale di San Matteo, Pisa	910*608 True Color 133 Kb
	Polyptych of Santa Caterina (detail) 1319 Tempera on wood Museo Nazionale di San Matteo, Pisa	971*592 True Color 149 Kb
	Polyptych of Santa Caterina (detail) 1319 Tempera on wood Museo Nazionale di San Matteo, Pisa	645*863 True Color 161 Kb