Muses (sacred poetry) is often seen with a pensive expression; Terpsichore (choral dance and song) is often seen dancing and carrying a lyre; Thalia (comedy) is often seen with a comic mask; and Urania (astronomy) carries a pair of compasses and the celestial globe. Greek "mousa" is a common noun as well as a type of goddess: it literally means "art" or "poetry". According to Pindar, to "carry a "mousa"" is "to excel in the arts". The word derives from the Indo-European root "men-", which is also the source of Greek "Mnemosyne" and "mania", English "mind", "mental" and "monitor", Sanskrit "mantra"
Muses and in Delphi and the Parnassus, where Apollo became known as "Mousagetes" ("Muse-leader") after the sites were rededicated to his cult. Often Muse-worship was associated with the hero-cults of poets: the tombs of Archilochus on Thasos and of Hesiod and Thamyris in Boeotia all played host to festivals in which poetic recitations accompanied sacrifices to the Muses. The Library of Alexandria and its circle of scholars formed around a "mousaion" (i.e., "museum" or shrine of the Muses) close to the tomb of Alexander the Great. Many Enlightenment figures sought to re-establish a "Cult of the Muses" in the 18th century.