Churrigueresque refers to a Spanish Baroque style of elaborate sculptural architectural ornament which emerged as a manner of stucco decoration in Spain in the late 1600s and was used up to about 1750, marked by extreme, expressive and florid decorative detailing, normally found above the entrance on the main facade of a building.
Named for the Churriguera family of Salamanca, its origins can be traced back to an architect and sculptor named Alonso Cano, who designed the facade of the cathedral at Granada in 1667.
The development of the style passed through three phases. Between 1680 and 1720, the Churriguera popularized Guarino Guarini's blend of Solomonic columns and composite order, known as "supreme order". Between 1720 and 1760, the Churrigueresque column, or estipite, in the shape of an inverted cone or obelisk, was established as a central element of ornamental decoration. The years from 1760 to 1780 saw a gradual shift of interest away from twisted movement and excessive ornamentation toward the Neoclassical balance and sobriety.
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Churrigueresque - Overview from The Grove Dictionary of Art of the most exuberantly ornamental phase of Spanish architectural decoration, which migrated to Spanish colonies in the New World.