Reyes Messía de la Cerda’s manuscript, Discursos festivos… of 1594, describes in detail the Eucharistic procession held in the collación del Salvador in Seville in the summer of that year. The work is an important document for the study of popular piety and festivity, and offers a rich overview of the treatment of the nature and use of sacred images in the Counter-Reformation period in late 16th-century Spain, before the development of the archiepiscopal regulations that concretised the effects of the Council of Trent.