Abstract : Allthough17th century baroque Spanish sacramental plays have been thoroughly studied, the same cannot be said of 16th century Spanish Eucharistic dramas and even less so of the theme of specific theatricality in the modest Renaissance plays. The study of 16th century Eucharistic plays required prior thought on the origins of a dramatic genre which developed in the Iberian peninsula throughout the Renaissance years, a period when religion was frequently the main issue (The crypto-Judaism, Council of Trent, the Counter-Reformation and the Moriscos). However, it is not just the obsessive questioning concerning the origins of Eucharistic dramas which guided these studies but above all the theatricality concept, by that we mean the signs containing a spectacularity potential within the dramatic text. This is essential in order to understand how this kind of theatre gradually acquired its own specific characteristics. We have worked on thirty-two original plays written in different styles. Our first point of interest was the dramatic space which shows that hellish and heavenly places acquire an increasing importance in this kind of theatre. The analysis of dialogues and of how they are linked together then allowed us to emphasize the space taken up by the "attack" and "movement-towards" figures (Michel Vinaver's terminology). Additionally, by taking inspiration from semiotic concepts relative to "surface semio-narrative" patterns like the Greimas' actancial model, we have shown different discursive strategies specific to Eucharistic dramas. This allowed us to study more thoroughly the mechanisms determining the dialogues and which characterize the links between the characters of this theatre. The evolution of comical elements has been highlighted by a detailed study of language and gestural techniques as well as a study of the effects produced by using typical theatre characters. Finally, an approach of the allegory in theatricality (element considered as fundamental in Spanish sacramental plays), has emphasized to which extent successive developments of this structure in 16th century Eucharistic drama have given a coherent structure to theatricality making the effects even more spectacular.