De la esleçión del ayre conveniente a la natura e hedat del sennor (…): the air in Estéfano de Sevilla’s letters of advice with regard to health addressed to Pedro (de Toledo), archbishop of Seville (c.1381)

Around the year 1381 Estéfano, a doctor in the service of the archbishop of Seville Pedro de Toledo (on numerous occasions identified as Pedro Gómez Barroso), wrote the treatise entitled Libro de visitaçione e conssiliaçione medicorum. The work, written in Castilian (only the title is in Latin), and which has survived incomplete, contains four “consiliatorios” for the treatment of the archbishop’s health. This article studies the first “consiliatorio” in part one of the book −in actual fact a regimen sanitatis− which deals with the air that is suitable for maintaining the health of a figure who belongs to the ecclesiastical elites of the late fourteenth century.