Rooster Weathervane, circa 1875

Weathervanes point into the direction of the wind. This helped viewers anticipate weather changes before local forecasts became common after 1920. Functional vanes required a basic pointing device and directional arms, but manufacturers added decorative elements, or ornaments, to appeal to consumer interests. Many churches installed a rooster, or weathercock, atop their spires to convey a moral lesson based in Christian gospels.