A Mexican acquaintance reminded me that today is Mexican Independence Day (commemorating September 16th, 1810), and I was moved to an appreciation of the Mexican flag:
The flag of Mexico (Spanish: Bandera de México) is a vertical tricolor of green, white, and red with the national coat of arms charged in the center of the white stripe. While the meaning of the colors has changed over time, these three colors were adopted by Mexico following independence from Spain during the country’s War of Independence, and subsequent First Mexican Empire.
… The central emblem is the Aztec pictogram for Tenochtitlan (now Mexico City), the center of the Aztec empire. It recalls the legend that inspired the Aztecs to settle on what was originally a lake-island… A ribbon in the national colors is at the bottom of the coat of arms. Throughout history, the flag has changed several times, as the design of the coat of arms and the length-width ratios of the flag have been modified. However, the coat of arms has had the same features throughout: an eagle, holding a serpent in its talon, is perched on top of a prickly pear cactus; the cactus is situated on a rock that rises above a lake. (link)
A fine flag: the customary few bands or stripes of color, making it easy to recognize (though not necessarily easy to distinguish from other national flags); plus the dramatic coat-of-arms scene in the center, involving the eagle, the serpent, and the nopales.