The Postgraduate Diploma in Interior Design, Private Perimeters has a history dating back over more than 10 years. Over 650 students from around the world had participated up to date. All of them support a program whose main objective is the promotion of creativity and innovation in the design, combined with a reflective and critical attitude by the student, offering professional preparation and an introduction to research. The Postgraduate programme supports and promotes the impulse of a "divergent thinking", which means the ability to respond in different ways to the same question. Through theoretical reflections the students gain new knowledge and a comprehensive understanding of current settings. They apply this acquired knowledge in the project that they will develop during the program. This interior design project is the core programme of the course while other assignments explore and open-up themes relevant to other professional field. The project is based on the design of a private domestic space in a specific context, taking into account all the elements necessary for its development, the level of living conditions, lighting, furniture, materials and finishes, sustainable aspects, the construction and production processes as well as visualization and communication of the project.