This project is © 2026 Br Isaac-Seraphin OFMCap. All rights reserved. The content on this website is provided for reference and study purposes only and does not constitute an official liturgical text. This site is a private, non-commercial resource intended to assist in the learning and recitation of the Missale Romanum. No claim of ownership is made over the original liturgical texts, which remain the intellectual property of their respective copyright holders. Users should refer to official liturgical editions and approved liturgical books for public celebration of Holy Mass. Content use is subject to applicable copyright and fair-use principles; if you believe any material is used improperly, please make contact with the editor at: PiusXPsalterSupplement@gmail.com

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The content of this site is sourced from the following:

• Unless otherwise noted, all Latin Mass texts are taken from the Missale Parvum © 1977, Libreria Editrice Vaticana, with the sole exception of the inserted invocations of Saint Joseph in the Eucharistic Prayers.

• All English rubrics and translations are taken from the English translation of The Roman Missal © 2010, International Commission on English in the Liturgy Corporation. All rights reserved. 

• The Latin of the prayers before and after Mass is taken from the Missale Parvum © 1977, Libreria Editrice Vaticana.

• The English translations of the same prayers are taken from The Divine Office, Volume 1 © 1974, The Hierarchies of Australia, England and Wales, Ireland.

• All audio content is original and remains the property of the editor.

• All images are in the public domain.