Question: Who wrote the fantasy novella which was reworked in 2014 with a series of paintings by a Spanish artist born in Olalla in 1954?

Context paragraphs:
La Leocadia: La Leocadia (Spanish: Doña Leocadia) or The Seductress (Spanish: Una Manola) are names given to a mural by the Spanish artist Francisco Goya (1746–1828), completed sometime between 1819–23, as one of his series of 14 "Black Paintings".  It shows a woman commonly identified as Goya's maid, companion and, most likely lover, Leocadia Weiss.  She is dressed in a dark, almost funeral maja dress, and leans against what is either a mantelpiece or burial mound, as she looks outward at the viewer with a sorrowful expression.  "Leocadia" is one of the final of the "Black Paintings", which he painted in his seventies at a time when he was consumed by political, physical and psychological turmoil, after he fled to the country from his position as court painter in Madrid.

The Wall of Serpents: The Wall of Serpents is a fantasy novella by American science fiction and fantasy authors L. Sprague de Camp and Fletcher Pratt.  The fourth story in their Harold Shea series, it was first published in the June 1953 issue of the fantasy pulp magazine "Fantasy Fiction".  It first appeared in book form, together with its sequel, "The Green Magician", in the collection "Wall of Serpents", issued in hardcover by Avalon Books in 1960; the book has been reissued by a number of other publishers since.  It has also been reprinted in various anthologies and collections, including "Great Short Novels of Adult Fantasy I" (1972), "The Complete Compleat Enchanter" (1989), and "" (2007).  It has been translated into Italian and German.

The Castle of Iron: The Castle of Iron is the title of a fantasy novella by American authors L. Sprague de Camp and Fletcher Pratt, and of the novel into which it was later expanded by the same authors.  It was the third story (and afterwards the second volume) in their Harold Shea series.  As a 35,000 word novella it was first published in the fantasy magazine "Unknown" for April, 1941.  The revised and expanded novel version was first published in hardcover by Gnome Press in 1950, and in paperback by Pyramid Books in 1962.  The book has been reprinted by a number of other publishers since its first appearance.  An E-book edition was published by Gollancz's SF Gateway imprint on September 29, 2011 as part of a general release of de Camp's works in electronic form.  The novel has been combined with other books in the series in the omnibus editions "The Compleat Enchanter" (1975), "The Complete Compleat Enchanter" (1989) and "" (2007).  It has also been translated into Italian.

Gaspar de la Huerta: Gaspar de la Huerta (1645–1714) was a Spanish artist born at Campillo de Altobuey in Cuenca.  At an early age, seeking instruction in Valencia, he fell into the hands of Jesualda Sanchez, the bustling widow of Pedro Infant, a third-rate painter, who continued on her own account her husband's school for the manufacture of religious pictures.  La Huerta, nevertheless, attained some skill as a draughtsman and colourist, and married the widow's well-dowered daughter.  Working for moderate prices he found abundant employment in the neighbouring churches and convents.  For the Franciscans he painted the "Jubilee of the Porciuncula", and for the Dominicans the picture which long served as a veil to the wondrous image of "Our Lady of the Forsaken".  He died at Valencia in 1714.  The Museum of Valencia possesses a pleasing picture of "Christ and the Virgin enthroned", the latter with the bright complexion peculiar to Valencian beauty.

The Roaring Trumpet: "The Roaring Trumpet" is a fantasy novella by American writers L. Sprague de Camp and Fletcher Pratt.  The initial story in their Harold Shea series, it was first published in the May 1940 issue of the fantasy pulp magazine "Unknown".  It first appeared in book form, together with its sequel, "The Mathematics of Magic", in the collection "The Incomplete Enchanter", issued in hardcover by Henry Holt and Company in 1941, and in paperback by Pyramid Books in 1960.  It has since been reprinted in various collections by numerous other publishers, including "The Compleat Enchanter" (1975), "The Incompleat Enchanter" (1979), "The Complete Compleat Enchanter" (1989), and "" (2007).  It has been translated into Dutch and Italian.  In 2016, the story was shortlisted for the Retro Hugo Award for Best Novella.

The Ice Dragon: The Ice Dragon is a children's fantasy novella by George R. R. Martin, originally published in 1980 in the Ace Books anthology "Dragons of Light".  It was later included in Martin's 1987 collection "Portraits of His Children".  The story was reworked in 2007 with artwork by Yvonne Gilbert and again in 2014 with a series of original paintings by Luis Royo.

The Green Magician: The Green Magician is a fantasy novella by American writers L. Sprague de Camp and Fletcher Pratt.  The fifth story in their Harold Shea series, it was first published in the November 1954 issue of the fantasy pulp magazine "Beyond Fiction".  It first appeared in book form, together with "The Wall of Serpents", in the collection "Wall of Serpents", issued in hardcover by Avalon Books in 1960; the book has been reissued by a number of other publishers since.  It has also been reprinted in various magazines, anthologies and collections, including "The Dragon" (June–July 1978), "The Complete Compleat Enchanter" (1989), "Masterpieces of Fantasy and Enchantment" (1988), and "" (2007).  It has been translated into Italian and German.

Luis Royo: Luis Royo (born 1954) is a Spanish artist born in Olalla, a village in the Aragonese province of Teruel.  He is best known for his fantasy illustrations published in numerous art books, magazines such as "Heavy Metal" and various other media including book and music CD covers, video games and Tarot cards.

The Mathematics of Magic: "The Mathematics of Magic" is a fantasy novella by American writers L. Sprague de Camp and Fletcher Pratt, the second story in their Harold Shea series.  It was first published in the August 1940 issue of the fantasy pulp magazine "Unknown".  It first appeared in book form, together with the preceding novella, "The Roaring Trumpet", in the collection "The Incomplete Enchanter", issued in hardcover by Henry Holt and Company in 1941, and in paperback by Pyramid Books in 1960.  It has since been reprinted in various collections by numerous other publishers, including "The Compleat Enchanter" (1975), "The Incompleat Enchanter" (1979), "The Complete Compleat Enchanter" (1989), and "" (2007).  It has been translated into Dutch and Italian.  In 2016, the story was shortlisted for the Retro Hugo Award for Best Novella.

Pilgrimage to the Fountain of San Isidro: Pilgrimage to the Fountain of San Isidro or The Holy Office (Spanish: Peregrinación a la fuente de San Isidro or El Santo Official ) are names given to an oil mural by the Spanish artist Francisco Goya (1746–1828), probably completed between 1821 and 1823.  The mural is one of the fourteen Black Paintings that Goya applied in oil on the plaster walls of his house.  Between 1874 and 1878 the paintings were transferred to canvas supports under the direction of the art restorer of the Museo del Prado, Salvador Martinez Cubells.

Supporting paragraphs: The Ice Dragon Luis Royo
Answer: George R. R. Martin