The course has been the backbone of the certificate program to become a “Building Biology Consultant IBN” since 1977. The main mission of the program is to educate and promote competence in the field of healthy, sustainable, and holistic building practices as well as natural lifestyles. Since its inception, about 7,000 people have successfully completed the Building Biology Course worldwide—not only in Germany, but also in the various languages in France, Italy, Japan, Spain, and the USA. Since mid-2016, the IBN has been offering the course in English.