Niobe boasted of her fourteen children, seven male and seven female (the Niobids), to Leto who only had two children, the twins Apollo and Artemis. Using arrows, Artemis killed Niobe's daughters and Apollo killed Niobe's sons. One Niobid was spared. Their father, Amphion, at the sight of his dead sons, either killed himself or was killed by Apollo for having sworn revenge. Devastated, Niobe fled to Mount Sipylus and was turned into stone, and, as she wept unceasingly, waters started to pour from her petrified complexion.
The only Niobid spared stayed greenish pale from horror for the rest of her life, and for that reason she was called Chloris (the pale one).
the composer´s YouTube video:
special thanks to Emilla Lagiewska for her unique album cover (https://plus.google.com/115290132868820112584)