**1.1. What is interior?**

"An interior is where we live, work and are entertained." "An interior is all and any place that embraces people to live." "An interior is a place that encloses and surrounds our life."

From these previous statements, we could possibly conclude that interiors are all spaces, whether inside or outside. These spaces have physical aspects and visual properties. Materials, furniture, furnishings and equipment that have colors, textures, shapes and forms define the physical conditions. On the other hand, the same spaces have psychological impacts due to their specific layouts, styles, colors and textures, which become places due to their belonging to someone. Therefore, through the particular selection of an interior's components, we, as designers, can affect the users unconsciously, even as they consciously experience these interiors. Whatever the design reflects, it will affect its users positively or negatively, depending on the designers' knowledge, skills and competencies. The wider the designer's experience, the closer the achievement of interior perfection and the better satisfaction of the users' needs.

Interiors—either design, decoration or architecture—represent the space that becomes a place because of its users. It is a creative challenge, which requires innovative solutions to enable people to react positively within it. The potential of interiors is realized in their connections with the design. It is the use of philosophy and concepts to create a unique design proposal. Interiors are sometimes the reflection of the exterior to some extent in many cases. There are no separations, isolation or detachment from the surroundings. A recognized practice is to bring life and activity to the interior spaces and convert them into interior places [1].
