Interior design is the art and science of enhancing the interior of a building to achieve a healthier and more aesthetically pleasing environment for the people using the space. An interior designer is someone who plans, researches, coordinates, and manages such enhancement projects. Interior design is a multifaceted profession that includes conceptual development, space planning, site inspections, programming, research, communicating with the stakeholders of a project, construction management, and execution of the design.
In the past, interiors were put together instinctively as a part of the process of building.
The profession of interior design has been a consequence of the development of society and the complex architecture that has resulted from the development of industrial processes.
The pursuit of effective use of space, user well-being and functional design has contributed to the development of the contemporary interior design profession. The profession of interior design is separate and distinct from the role of interior decorator, a term commonly used in the US; the term is less common in the UK, where the profession of interior design is still unregulated and therefore, strictly speaking, not yet officially a profession.
In ancient India, architects would also function as interior designers. This can be seen from the references of Vishwakarma the architect—one of the gods in Indian mythology. In these architects' design of 17th-century Indian homes, sculptures depicting ancient texts and events are seen inside the palaces, while during the medieval times wall art paintings were a common feature of palace-like mansions in India commonly known as havelis. While most traditional homes have been demolished to make way to modern buildings, there are still around 2000 havelis in the Shekhawati region of Rajashtan that display wall art paintings.
In ancient Egypt, "soul houses" (or models of houses) were placed in tombs as receptacles for food offerings.