In the course of his life Diego Rivera became familiar with and practiced a large number of artistic techniques. Some extraordinary examples of this variety of media can be found in the collection of the Dolores Olmedo Museum, such as this tracing for the Execution by Firing Squad of Maximilian, a preparatory work made in 1935 for the mural Rivera painted in the National Palace in Mexico City.
Made in sepia ink on paper, this tracing shows signs of stencil technique, one of the oldest, which artists like Michelangelo used on their frescoes.