Guillermo Monroy Becerril (Tlalpujahua, Michoacán, 1924) studied at La Esmeralda (National School of Painting, Sculpture and Printmaking) where he was taught by renowned artists such as Feliciano Peña, Raúl Anguiano, Agustín Lazo, José Chávez Morado, Diego Rivera, and Frida Kahlo, which led to his inclusion in the group known as “Los Fridos.” He also studied at the Taller de Ensaye de Materiales Plásticos (Fine Art Materials Practice Workshop) at the Instituto Politécnico Nacional (National Polytechnic Institute) and distinguished himself as an assistant to the great muralist masters, while simultaneously undertaking various individual mural projects.

He was a member of several important artistic collectives, including the Taller de Gráfica Popular (Workshop for Popular Graphic Art), the Taller de Integración Plástica (Workshop for Art Integration), the Célula Artística “Silvestre Revueltas” (Silvestre Revueltas Artistic Cell), the Grupo de Pintores Jóvenes Revolucionarios (Group of Young Revolutionary Painters), the Frente Revolucionario de Pintores, Escultores y Grabadores (Revolutionary Front of Painters, Sculptors, and Printmakers), the Frente Nacional de Artes Plásticas (National Front of Fine Arts), the Nueva Generación de Pintores Muralistas (New Generation of Muralist Painters), and the Agrupación Cultural Morelense (Morelos Cultural Association). Additionally, he co-founded the Taller Frida Kahlo (Frida Kahlo Workshop).

Monroy also worked as an educator at several institutions, including La Esmeralda, the Instituto de Ciencias y Artes de Chiapas (Institute of Science and Arts of Chiapas), the Centro Cultural Vito Alesio Robles (Vito Alessio Robles Cultural Center), and the Instituto Regional de Bellas Artes de Acapulco (Regional Institute of Fine Arts) in Acapulco. After relocating to Cuernavaca, Morelos, he collaborated with other artists residing in the area and contributed as an illustrator for various print media, such as El Zapata Ilustrado magazine. This has earned him recognition as a pioneer and promoter of art and culture in the region. His work has been exhibited in prominent venues, including the Palacio de Bellas Artes (Palace of Fine Arts), the Galería de la Plástica Mexicana (Mexican Fine Art Gallery) and the Museo Anahuacalli (Anahuacalli Museum), among others, solidifying a rich artistic trajectory that has been honored on multiple occasions.