A journey through Latin American muralism illustrates the different characteristics of the paintings on the walls and their correct denomination, and therefore the difference between urban art and public art is discussed, making a quick passage through the history of wall painting to understand both concepts in depth, since muralism is located within public art, but we cannot speak of a revolutionary muralism prior to 1922, when the meaning of mural painting was changed and the foundations of what muralism is today were laid. Siqueiros was undoubtedly the most controversial and restless of the three great muralists of the Mexican Movement and, largely thanks to him, the Movement acquired the diffusion and scope it had, thus remaining in history as the only Latin American movement that influenced the rest of the world, which is why it is still being studied and this book aims to make a small contribution to understanding its magnitude through the development of muralism in countries such as Brazil, Chile and particularly Argentina, where the largest organisation in the world was formed: the International Movement of Muralists Italo Grassi. International Movement of Muralists Italo Grassi.