Casta paintings were paintings depicting social hierarchy and social class in the Spanish Empire.  They  were presented most commonly in a series of sixteen individual canvases or a single canvas divided into sixteen compartments. The series usually depict a man, woman, and child, arranged according to a hierarchies of race and status, the latter increasingly represented by occupation as well as dress by the mid-eighteenth century. The paintings are usually numbered and the racial mixtures identified in inscriptions.  Spanish men are often portrayed as men of leisure or professionals, blacks and mulattos as coachmen, Indians as food vendors, and mestizos as tailors, shoemakers, and tobacconists. Mulattas and mestizas are often represented as cooks, spinners, and seamstresses. Despite clear duplication, significant variations occur in casta sets produced throughout the eighteenth and early nineteenth centuries. Whereas some series restrict themselves to representation and specification of racial mixtures, dress styles, and material culture, others are more detailed in their representation of flora and fauna peculiar to the New World (avocados, prickly pear, parrots, armadillos, and different types of indigenous peoples). While the majority appear to be in urban settings, several series depict rural landscapes.

Edited from: https://notevenpast.org/casta-paintings/