Title: Masterpiece
Content:   Masterpiece, magnum opus (Latin, great work) or chef-d’œuvre (French, master of work, plural chefs-d’œuvre) in modern use is a creation that has been given much critical praise, especially one that is considered the greatest work of a person's career or to a work of outstanding creativity, skill, profundity, or workmanship. Historically, a "masterpiece" was a work of a very high standard produced to obtain membership of a guild or academy in various areas of the visual arts and crafts.
Title: Masterpiece
Content:  The form masterstik is recorded in English or Scots in a set of Aberdeen guild regulations dated to 1579, whereas "masterpiece" is first found in 1605, already outside a guild context, in a Ben Jonson play. "Masterprize" was another early variant in English. In English, the term rapidly became used in a variety of contexts for an exceptionally good piece of creative work, and was "in early use, often applied to man as the 'masterpiece' of God or Nature".
Title: Masterpiece
Content:  In modern use, a masterpiece is a creation in any area of the arts that has been given much critical praise, especially one that is considered the greatest work of a person's career or to a work of outstanding creativity, skill, profundity, or workmanship. For example the novel David Copperfield by Charles Dickens is generally considered a literary masterpiece. The term is often used loosely, and some critics such as Edward Douglas of the Tracking Board feel it is overused in describing recent films.
Title: Masterpiece
Content:  Originally, the term masterpiece referred to a piece of work produced by an apprentice or journeyman aspiring to become a master craftsman in the old European guild system. His fitness to qualify for guild membership was judged partly by the masterpiece, and if he was successful, the piece was retained by the guild. Great care was therefore taken to produce a fine piece in whatever the craft was, whether confectionery, painting, goldsmithing, knifemaking, leatherworking, or many other trades. In London, in the 17th century, the Worshipful Company of Goldsmiths, for instance, required an apprentice to produce a masterpiece under their supervision at a "workhouse" in Goldsmiths' 
Title: Masterpiece
Content:  same system was used. The best-known example today is Richard Wagner's opera Die Meistersinger von Nürnberg (1868), where much of the plot is concerned with the hero's composition and performance of a "masterpiece" song, to allow him to become a meistersinger in the (non-commercial) Nuremberg guild. This follows the surviving rulebook of the guild. The practice of producing a masterpiece has continued in some modern academies of art, where the general term for such works is now reception piece. The Royal Academy in London uses the term "diploma work" and it has acquired a fine collection of diploma works received as a condition of membership.
Title: Master of the Prayer Books of around 1500
Content:  The Master of the Prayer Books of around 1500 was a Flemish painter of illuminated manuscripts and miniatures active in Bruges from about 1485 until around 1520. His name is derived from a collection of devotional manuscripts from the same artist dating to about the start of the 16th century. The name notwithstanding, the Master is best known for the work he did painting secular images, incorporating details from daily life in a number of his original narratives. His interest in courtly life, as well as the daily activities of the lower classes, may be seen as well in his paintings for calendars. Unlike other artists of his time, he didn't show interest in painting landscapes. His exceptional Roman de la Rose British Library Harley MS 4425 has 92 large and high quality miniatures, with a date around 1500.
Title: List of calques
Content: Masterpiece: probably translation of Dutch meesterstuk or German Meisterstück: Dutch meester and German Meister, master + Dutch stuk and German Stück, piece of work. (The Dutch translation of masterpiece is meesterwerk, the German translation is Meisterwerk. A Meisterstück is the craftwork that serves as a sort of "thesis" for a master craftsman-to-be.) 
Title: What is a Masterpiece?
Content:  he argued that it is the "creation of an individual artist's authentic genius." At the same time, he expounded a number of other aspects that for him were essential in the configuration of a masterpiece: that it is "a confluence of memories and emotions forming a single idea", that it has "a power of recreating traditional forms so that they become expressive of an artist's own epoch and yet keep a relationship to the past". The highest masterpieces are said to be "illustrations of great themes." Clark also implicitly excluded the erotic from considerations of what constituted a masterpiece, based on his perspective that a necessary condition is the balance between sense and form (works that are too sensual are, therefore, unbalanced and not to be categorised at masterpiece level).
Title: Master of Flora
Content:  drawings have also been proposed as possible candidates for his work: a "Cephalus and Procris" (Morgan Library), an "Annunciation" (Albertina), and an "Apollo and the Muses" (Louvre). In 1578, he may have been commissioned by Count Antoine III de Clermont to complete a work begun by someone else years before. Several candidates for being the Master have been suggested; Jean Cousin the Younger, whose life and works are poorly documented, and other artists who worked with Le Primatrice or Nicolo dell'Abate, such as Giulio Camillo dell'Abate (Nicolo's son) and Ruggiero de Ruggieri (fl.1540-1595), another artist about whom little is known.
Title: Master of Ambrass
Content:   The Master of Ambrass was a Bohemian painter active probably in Prague at the end of the fourteenth century. He was the creator of the Wiener Musterbuch, a set of silverpoint studies and subjects all dated to the same period, which were used as models in painters' studios. Among the subjects are bust-length images of Christ, the Virgin, various saints, the Crucifixion, and the Annunciation. The pictures are collected in groups of four, affixed to fourteen small framed panels. Three independent designs also exist, depicting a philosopher and astronomer, a sibyl and John the Evangelist, and the Three Magi; these, too, were probably part of the set. Such is the realism of the designs that it is believed the Master had contact with an artist of the Franco-Flemish school. Also attributed to his hand, dubiously, is an Annunciation at the Fogg Art Museum in Cambridge, Massachusetts. Stylistically, the Master's work bears some similarities to that of the Master of the Pähl Altarpiece. He is sometimes conflated with both the Master of the Gerona Martyrology and the Master of the Rajhrad Altarpiece, but this attribution is not universally accepted.

Question: Who is the author of Masterpiece?
Answer: Elise Broach.