Interior design is the art and science of enhancing the interior of a building to create a healthier and more aesthetically pleasing environment for those who use the space. An interior designer is someone who plans, researches, coordinates and directs such improvement projects. An interior designer is a multifaceted profession that includes concept development, space planning, site visits, scheduling, research, communication with project stakeholders, construction management, etc., and project execution.

Typical interior of one of the houses in the Vlkolíniec Folk Architecture Park (Slovakia) 

 In the past, interiors were designed instinctively as  part of the building process.[1] 

 The  interior design profession is a consequence of societal evolution and the complex architecture resulting from the development of industrial processes.

 The pursuit of efficient use of space, user well-being and functional design has contributed to the development of the modern interior design profession. The  interior design profession is separate and distinct from the role of interior decorator, a term commonly used in the United States. The term is less common in the UK, where the  interior design profession is not yet regulated and is therefore not, strictly speaking, an official profession. 

In ancient India, architects were also  interior designers. This can be deduced from the mention of  the architect Vishwakarma, one of the gods of Indian mythology. In these  17th-century Indian architects and house designs, carvings depicting ancient texts and events can be seen in the palaces, while in medieval times wall  paintings were a common feature of palatial dwellings in India, commonly referred to as havelis. Although most of the traditional houses have been demolished to  make way for 

 modern buildings, there are still around 2,000 villas in the Shekhawati region of Rajasthan[2] where the murals can be seen. 

 In ancient Egypt, "soul houses" (or model houses) were placed in tombs as receptacles for food offerings.From this, details of the interior layout of various residences of different  Egyptian dynasties can be discerned, such as changes in ventilation, porches, columns, loggias, windows and doors. 

 Reconstructed Roman triclinium or dining room with three clinai or sofas. 

 Interior wall paintings have existed for at least 5,000 years, with examples  as early as the Ness of Brodgar[4], as well as stenciled interiors such as the Rules of Skara Brae show this.[5] It's the Greeks, then the Romans in the first millennium BC. They added matching decorative mosaic floors and stenciled baths, shops, civil offices, castra (fortress) and temples, and interiors. With specialized companies for the manufacture of interior decorations and furniture according to the 

 formula in buildings built according to the forms defined by Roman architects such as Vitruvius: De architectura, libri decem (The Ten Books of Architecture).

Throughout the 17th and 18th centuries and into the early 19th century, interior decoration was done by a housewife, an  upholsterer or a hired craftsman who advised on the artistic style of the interior decoration. Architects  also employed craftsmen  to decorate the interiors of their buildings. 

 In the mid to late 19th century, interior design services grew significantly as the middle class in developed countries grew in power and wealth and began coveting national tokens of wealth to cement their new status. Large furniture companies have started to deal with general interior design and management, offering complete interior items in different styles. This business model evolved from  mid-century to 1914, when the role was increasingly filled by independent, often  amateur, designers.This paved the way for the emergence of  professional interior design in the mid-20th century.[9] 

 Illustrated Catalog of the James Shoolbred Company published  1876. 

  upholsterers began to expand their business in the 1950s and 1960s. They treat their business broader and in artistic categories and start promoting their furniture. To meet the growing demand for custom interior work on projects such as offices, hotels and public buildings, these companies have become much larger and more complex, employing builders, carpenters, plasterers, textile designers, 

artists and furniture designers, and engineers. and technicians to get the 

 to do the job.Businesses began publishing and distributing printed catalogs in various lavish styles to appeal to the burgeoning middle class. 

 As department stores increased in number and size, storefronts were decorated in different styles to serve as a model for customers. A particularly effective advertising tool was the setting up of showrooms in the showrooms of national and international exhibitions open to the public. Pioneer companies in this field include Waring & Gillow, James Shoolbred, Mintons & Holland & Son. These traditional, high-quality furniture companies began to play an important role as advisors in conveying taste and style to middle-class customers, and began designing and Home Improvemen furnishing many of Britain's notable buildings.[10] 

 such companies emerged  after the Civil War in America. Founded by two exiled German  brothers, Gebrüder Herter began as a warehouse for upholstery fabrics and grew into one of the earliest furniture manufacturers and interior designers. With their own design office, joinery and upholstery workshops, the Herter brothers were ready to undertake all aspects of interior decoration, including decorative woodwork and fireplaces, wall and ceiling decorations, patterns, and carpets and curtains.