Complex sentence: He painted his most significant works, three altarpieces, in the Florentine contado, or countryside; these altarpieces were created for Sant’Andrea a Ripalta in Figline, Santa Margarita in Cortona, and the Badia degli Olivetani di San Bartolomeo alle Sacce near Prato.
Split into simpler sentences: He painted his most significant works, three altarpieces, in the Florentine contado, or countryside. These altarpieces were created for Sant’Andrea a Ripalta in Figline, Santa Margarita in Cortona, and the Badia degli Olivetani di San Bartolomeo alle Sacce near Prato.