Short answers, pulled from the story.
The word rococo first appeared in print in 1825 to describe decoration that was out of style and old-fashioned. Pierre-Maurice Quays used the term as a humorous variation of rocaille between 1777 and 1803.
French Rocaille appeared in Paris during Louis XV's reign and flourished between 1723 and 1759. Southern Germany and Austria saw the decorative style reach its summit from the 1730s until the 1770s.
Dominikus Zimmermann designed the Wieskirche which stands as one of the most notable Bavarian pilgrimage churches built between 1745 and 1754. The oval-shaped sanctuary fills the church with light from all sides while white walls contrast with columns of blue and pink stucco.
Materials included painted or white stucco, combinations of oak, beech, or walnut woods, lacquered Japanese-style wood, gilded bronze, and marble. Warm pastel colors like whitish-yellow, cream-colored, pearl greys, and very light blues defined the palette.
By 1785 Rococo had passed out of fashion in France replaced by the order and seriousness of Neoclassical artists like Jacques-Louis David. Voltaire and Jacques-François Blondel began voicing criticism of the superficiality and degeneracy of the art in the early 1760s.