In Greek mythology, Thalia (Θάλεια , "good cheer") was the muse of comedy and pastoral poetry. She was a rural goddess with the attributes of a comic mask and a shepherd's crook. Her names came from θάλλεω, meaning "to bloom". By the god Apollo came the Corybantes, priests who castrated themselves in accordance to the goddess Cybele.

Thalia - oil on canvas by Jean-Marc Nattier 1739

Thomas Jefferson Building, Washington, D.C., Edward Simmons : Thalia

Thalia was also the name of one of the Charites, and the name of a nymph who was the mother of the Palici with Zeus or Hephaestus.

Thalia, the Nymph carried by Zeus as an eagle. This Nymph from Mount Aetna could be derived from the Muse Thalia.

Thalia, Pio Clementino Inv295

Thalia, Sarcophagus, Louvre Ma475

The Muse Erato, Eustache Le Sueur

The Muses Clio, Euterpe and Thalia, Eustache Le Sueur

Thalia, Study for " Parnassus", Raphael

The muse Thalia, Timoteo Viti

The nymph Thalia may have been the same as the Muse or Charite.

There is a Thalia Street in New Orleans, between Erato and Melpomene Streets.

The Nine Muses
Calliope Euterpe Terpsichore	Clio Melpomene Thalia	Erato Polyhymnia Urania