Etrog

Wheat, grapes, citrons, figs, pomegranates, and olives have all been presented as the fruit that Adam and Eve ate, yet the apple, which only entered the scene in the 12^th century C.E., became the most popular candidate.

A luxury Persian import, famous for its medicinal qualities and lovely smell, the citron became Sukkot’s פְּרִי עֵץ הָדָר “fruit of a splendid tree” in the first century C.E.