Kalliope, or Calliope, whose name means beautiful-voiced, is a Greek goddess and one of the nine Mousai, or Muses. Her sphere of influence is that of epic poetry (such as Homer's Iliad), and she was also said to bestow eloquence, especially on kings and princes. Her symbols are a tablet and stylus, a scroll, or a lyre.
Erato, whose name means something like "beloved" or "lovely," is a Greek goddess, one of the nine Mousai, or Muses. Her sphere of influence is that of love poetry and erotic poetry. Her symbols are the lyre, or a similar instrument, the cithara. Beginning during the Renaissance, she would often be shown wearing a wreath of myrtle and roses.
Euterpe, whose name means "well pleasing," or "(giver of) delight," is a Greek goddess and one of the nine Mousai, or Muses. Her sphere of influence is that of music, song, and lyric poetry, which is a form of poetry which expresses personal emotions or feelings. In Greece this type of poetry generally would have been sung, and accompanied by a lyre or other stringed instrument. Her symbols are the aulos (a type of flute), pan pipes, and a laurel wreath.