Gastronomy is the study of the relationship between food and culture, the art of preparing and serving rich or delicate and appetizing food, the cooking styles of particular regions, and the science of good eating. One who is well versed in gastronomy is called a gastronome, while a gastronomist is one who unites theory and practice in the study of gastronomy. Practical gastronomy is associated with the practice and study of the preparation, production, and service of the various foods and beverages, from countries around the world. Theoretical gastronomy supports practical gastronomy. It is related with a system and process approach, focused on recipes, techniques and cookery books. Food gastronomy is connected with food and beverages and their genesis. Technical gastronomy underpins practical gastronomy, introducing a rigorous approach to evaluation of gastronomic topics. Etymology Archestratus wrote a guide to the foods of the Mediterranean in the form of a poem called "Gastronomy", according to Chrysippus of Tyana; only fragmentary quotations remain. The word is a compound of Greek 'stomach' and lit. 'custom', modeled on 'astronomy'. It was revived in 1801 as the title of a poem by . It was Brillat-Savarin, in his Physiologie du goût (1825) who systematized the study of food and cooking under this name. History Gastronomy involves discovering, tasting, experiencing, researching, understanding and writing about food preparation and the sensory qualities of human nutrition as a whole. It also studies how nutrition interfaces with the broader culture. The biological and chemical basis of cooking has become known as molecular gastronomy, while gastronomy covers a much broader, interdisciplinary ground. Pascal Ory, a French historian, defines gastronomy as the establishment of rules of eating and drinking, an "art of the table", and distinguishes it from good cooking () or fine cooking (). Ory traces the origins of gastronomy back to the French reign of Louis XIV when people took interest in developing rules to discriminate between good and bad style and extended their thinking to define good culinary taste. The lavish and sophisticated cuisine and practices of the French court became the culinary model for the French. Alexandre Grimod de La Reynière wrote the gastronomic work (1803), elevating the status of food discourse to a disciplined level based on his views of French tradition and morals. Grimod aimed to reestablish order lost after the revolution and institute gastronomy as a serious subject in France. Grimod expanded gastronomic literature