On the path to a holistic architecture. The 21st century presents us with new architectural and technical challenges in shaping our environment. Today, the principle of sustainability is at the forefront of construction. However, we must not forget that we are building not only for the environment but, above all, for the people who will live in the new highly insulated energy-saving homes. Therefore, health-related building biology aspects must not be overlooked in ecological construction. Building biology represents a holistic approach to understanding the needs of humans and their environment. This book showcases current projects from German architectural firms that have creatively implemented the diverse wishes of both building biology and ecological clientele.