PROMPT:An Art Nouveau style historical infographic poster in 16:9 horizontal format about Greek mythology, featuring an elegant flowing composition inspired by classical decorative poster design, with ornate floral borders, curling vines, golden laurel motifs, and graceful asymmetrical linework; the central artwork should depict the Olympian family tree as a beautiful mythic tableau with Zeus, Hera, Athena, Apollo, Artemis, Poseidon, and Aphrodite arranged in a ceremonial vertical hierarchy around Mount Olympus, each god or goddess framed by stylized Art Nouveau halos, flowing hair, marble columns, peacocks, olive branches, stars, waves, and moon crescents, all drawn with elongated elegant contours and rich decorative detail; use a palette of deep teal, antique gold, cream, and muted rose, with subtle gradients only in the illustrated figures and background sky; place the title at the top in large ornamental serif lettering reading GREEK MYTHOLOGY, with the subtitle THE OLYMPIAN FAMILY TREE beneath it in smaller elegant text; organize the facts into decorative side panels with graceful curved frames and thin gold rules, including sections labeled ORIGINS, GODS OF OLYMPUS, SYMBOLS, POWERS, HEROES, and LEGACY, plus a small DID YOU KNOW? box near the lower corner with five original myth facts; the entire poster should feel luxurious, classical, poetic, and richly decorative, with no modern UI, no copyrighted artwork, and a true Art Nouveau atmosphere, 16:9 horizontal ratio