Muses, in Greek mythology, the nine patron goddesses of the arts: Calliope (epic poetry and eloquence), Euterpe (music and lyric comedy), Erato (love poetry); Polyhymnia (oratory ad sacred poetry), Clio (history), Melpomene (tragedy), Thalia (comedy), Terpisichore (choral song and dance), and Urania (astronomy). Columbia Encyclopedia {This is useful for crossword puzzles.)

The Seven Wonders of the Ancient World: Great Pyramid of Giza, Hanging Gardens of Babylon, Temple of Artemis, Statue of Zeus at Olympia, Mausoleum at Halicarnassus, Colossus of Rhodes, and the Lighthouse of Alexandria.

The Seven Dwarfs: Happy, Dopey, Grumpy, Bashful, Sneezy, Sleepy and Doc.

These things haunt me. You too?