The mountain spring Cassotis on Mount Parnassus was sacred to Euterpe and the other Muses.

It flowed between two high rocks above the city of Delphi, and in ancient times its sacred waters were retained for the use of the Pythia, the priests, priestesses, as well as the oracle of Apollo.

Pindar and other sources (the author of the Bibliotheca[5], and Servius[6]), describe the Thracian king Rhesus, who appears in the Iliad, as son of Euterpe and the river-god Strymon; Homer calls him son of Eioneus.

[7] Euterpe's role, alongside her sisters, was to entertain the gods on Mount Olympus.

Traditionally, musicians would invoke Euterpe to inspire, guide and assist them in their compositions.