The prints were made by invitation and reproduce four original drawings by Álvaro Siza, created at different moments in his life. The works can be grouped into two, with the horse and religion/mythology as the main themes. These are not unfamiliar subjects for the architect, who learned to draw horses at a very young age and who, throughout his professional career, frequently engaged in architectural, design, and publication projects that conveyed a spiritual dimension related to religion and the interpretation of mythological stories that have endured into modern times.