Calliope was the muse of Epic and Heroic Poetry. Theoretically, she is the oldest of the nine muses, but Rhinos have always wondered if that rumor was prompted by one of her many sisters.
The Ancient Greeks had many interesting ideas and theories about the Past, and honored those thoughts in sweeping poetry, usually publicly read to an appreciative audience.
Rhinos like to think of other cultures thinking well of themselves. Why not?