The Max Planck-Harvard Research Center for Quantum Optics (MPHQ) joins the expertise of the Max Planck Institute of Quantum Optics (MPQ) and the Harvard University Department of Physics to support research and educational activities in fundamental and applied physics ranging from quantum gases, quantum sensing, quantum metrology, and quantum control to quantum chemistry, quantum many-body systems, and quantum information science. MPHQ seeks to transcend traditional boundaries by establishing a model of international collaborative research that will address the most challenging problems in quantum science and educate the next generation of leaders in the field.