Laudato si' is an oratorio composed in 2016 by Peter Reulein on a libretto by Helmut Schlegel. Subtitled Ein franziskanisches Magnificat, it includes the full Latin text of the Magnificat, expanded by writings of Clare of Assisi, Francis of Assisi and Pope Francis. The composer set it for five soloists, children's choir, Choralschola, mixed choir, symphony orchestra and organ. It was published in 2016 by the Dehm Verlag, and was premiered on 6 November 2016 at the Limburg Cathedral, conducted by the composer.

Peter Reulein is a German composer, organ improviser, academic teacher and church musician, from 2000 at the church Liebfrauen in Frankfurt am Main. In 2016 he composed for the Catholic Diocese of Limburg the Franciscan oratorio Laudato si'.