When used in conversation, grotesque commonly means strange, fantastic, ugly or bizarre, and thus is often used to describe weird shapes and distorted forms such as Halloween masks or gargoyles on churches. More specifically, the grotesque forms on Gothic buildings, when not used as drain-spouts, should be called grotesques or chimeras rather than gargoyles.

Etymology

The word grotesque comes from the same Latin root as "grotto", meaning a small cave or hollow. The expression comes from the unearthing and rediscovery of ancient Roman decorations in caves and buried sites in the 15th century. These "caves" were in fact rooms and corridors of the Domus Aurea, the unfinished palace complex started by Nero after the great fire from 64 AD.

In art history

In art, grotesques are a decorative form of arabesques with interlaced garlands and strange animal figures. Such designs were fashionable in ancient Rome, as fresco wall decoration, floor mosaics, etc., and were decried by Vitruvius (ca. 30 BCE), who in dismissing them as meaningless and illogical, offered quite a good description: "reeds are substituted for columns fluted appendages with curly leaves and volutes take the place of pediments, candelabra support representations of shrines, and on top of their roofs grow slender stalks and volutes with human figures senselessly seated upon them." When Nero's Domus Aurea was inadvertently rediscovered in the late fifteenth century, buried in fifteen hundred years of fill, so that the rooms had the aspect of underground grottoes, the Roman wall decorations in fresco and delicate stucco were a revelation; they were introduced by Raphael Sanzio and his team of decorative painters, who developed grottesche into a complete system of ornament in the Loggias that are part of the series of Raphael's Rooms in the Vatican Palace, Rome. "The decorations astonished and charmed a generation of artists that was familiar with the grammar of the classical orders but had not guessed till then that in their private houses the Romans had often disregarded those rules and had adopted instead a more fanciful and informal style that was all lightness, elegance and grace." In these grotesque decorations a tablet or candelabrum might provide a focus; frames were extended into scrolls that formed part of the surrounding designs as a kind of scaffold, as Peter Ward-Jackson noted. Light scrolling grotesques could be ordered by confining them within the framing of a pilaster to give them more structure. Giovanni da Udine took up the theme of grotesques in decorating the Villa Madama, the most influential of the new Roman villas.

Through engravings the grotesque mode of surface ornament passed into the European artistic repertory of the sixteenth century, from Spain to Poland. Soon grottesche appeared in marquetry (fine woodwork), in maiolica produced above all at Urbino from the late 1520s, then in book illustration and in other decorative uses. At Fontainebleau Rosso Fiorentino and his team enriched the vocabulary of grotesques by combining them with the decorative form of strapwork, the portrayal of leather straps in plaster or wood moldings, which forms an element in grotesques. By extension backwards in time, in modern terminology for medieval illuminated manuscripts, drolleries, half-human thumbnail vignettes drawn in the margins, are also called "grotesques".