The Florian Psalter is a trilingual manuscript psalter, written between late 14th and early 15th centuries (probably between ca 1395-ca 1405) Its author, first owners, and place of origin are still not certain. It was named after St. Florian Monastery in Sankt Florian (Austria) where it was discovered in 1827. The manuscript is currently kept at the National Library in Warsaw. The manuscript consists of a trilingual translation of the psalms into Latin, Polish and German. The Polish text is the oldest known translation of the Book of Psalms into that language. It also contains musical score for canticles. Every parchment is magnificently decorated and illustrated with astrological and Christian symbology.