I approach the contribution of brother Andres de Olmos to New Spain's theater of evangelization. The main objective of this work is to propose an assessment of the role that the Franciscan brother played in the development of the theater of evangelization. To do this, I will analyze the Auto of the 'Final Judgement, whose authorship is attributed to him. The paper explores the hypothesis that Olmos could have used the theater as an evangelization tool in the Northeast of Mexico, in Tamaulipas.