Diamond photonics in general is the physical science of photon generation, detection, and manipulation through emission, transmission, modulation, signal processing, switching, amplification, and sensing based on diamond or on nano-diamond. Diamond possesses remarkable physical and chemical properties, high mechanical hardness, large Young ́s module and high thermal conductivity. In addition to that, it enters more and more also the quantum optics stage. Diamond has a wide transparency window from the ultraviolet to the infrared spectral range, has a high refractive index and it may contain a variety of defect centres. Therefore, diamond is a very interesting and promising material for many applications, from which the fields of quantum information, quantum optics and quantum radiometry

belong to the most exciting ones. In this workshop, we will focus on the fabrication, characterization and application of colour centres in (nano-) diamond for the above mentioned applications. Top level presentations by outstanding experts on this field will begiven on the-state-of-the-art and recent developments.