The collection of nearly 200 altarpieces, coming mainly from homes of Zacatecas, was gathered and kindly donated by local Fernando Juárez Frías. These pieces were made in oil on tin by anonymous artisans and date from the 19th century, except for three New Spin altarpieces made on wood from the 16th, 17th and 18th centuries. These altarpieces express the popular religious fervor of an independent nation and constitute a particular artistic expression of anonymous authors that vanished from the dissemination of massive reproduction means of graphics, which till today, have been substituted by printed images in series like stamps and religious cards.