For 10 points, identify these figures from Greek mythology, which include Clio and Terpsichore.
A castle can be seen in the background of a de Chirico work which shows three mannequins in Ferrara and is titled after these figures, and an ovoid head in a tilted plane rests on a side in a work titled after a Sleeping one by Constantin Brancusi. Another of these figures holds a trumpet as she poses for a portrait in Jan Vermeer's Allegory of Painting, while an actress named Sarah Siddons who wears several necklaces and is seated on a throne represents the "Tragic" one in a portrait by Joshua Reynolds. For 10 points, identify these figures from Greek mythology, which include Clio and Terpsichore.
A castle can be seen in the background of a de Chirico work which shows three mannequins in Ferrara and is titled after these figures, and an ovoid head in a tilted plane rests on a side in a work titled after a Sleeping one by Constantin Brancusi.
{Muses} [accept {Disquieting Muses} until “{ovoid head}”]