In ancient Greek religion, culture, and mythology, the Muses were the inspirational goddesses of literature, science, and the arts.
The number and names of the Muses differed by region, but from the Classical period, the number of Muses was standardized to nine, and their names were generally given as Calliope, Clio, Polyhymnia, Euterpe, Terpsichore, Erato, Melpomene, Thalia, and Urania.
These were the notorious list of literary Muses from best to worst.
However, the classical understanding of the Muses tripled their triad and established a set of nine goddesses, who embody the arts and inspire creation with their graces through remembered and improvised song and mime, writing, traditional music, and dance. It was not until Hellenistic times that the following systematic set of functions became associated with them, and even then some variation persisted both in their names and in their attributes:
