Act for the Immaculate Conception of Mary

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Act for the Immaculate Conception of Mary ({{langx|ca|Acte per a la Immaculada Conceptio de Maria}}) is the name of a dramatic play, in the Catalan language, likely performed in Bethlehem College in Barcelona on May 13, 1662, to celebrate a declaration of Pope Alexander VII in support of the idea of Immaculate Conception.{{cite book|author1=Albert Rossich|author2=Antoni Serrà Campins|author3=Pep Valsalobre|title=El teatre català dels orígens al segle XVIII: actes del II Col·loqui problemes i mètodes de literatura catalana antiga: "Teatre català antic"; Girona, 6 al 9 de juliol 1998|url=https://books.google.com/books?id=qHJkZs_8ZugC&pg=PA78|year=2001|publisher=Edition Reichenberger|language=ca|isbn=978-3-935004-34-3|pages=78–}}

The work argues for the absence of original sin in the one who was to become the Mother of God.

The author of the allegorical play is unknown, and only a fragment of 732 verses has been preserved. These demonstrate the ambitious nature of the play, both in literary and theological terms.