The Hamburg Centre for Ultrafast Imaging (CUI) is a research facility established in the context of the Universities Excellence Initiative by the German Federal and State Governments. The multidisciplinary and interinstitutional cluster is located at Universität Hamburg, Hamburg, Germany, and has been initiated on 1 November 2012. The funding with more than €25 million by the German Research Foundation will run until 31. December 2018. Scientific teams cooperating in the cluster come from the Universität Hamburg, the Deutsches Elektronen-Synchrotron (DESY), the European XFEL GmbH (XFEL), the European Molecular Biology Laboratory (EMBL), and the newly founded Max-Planck-Institute for the Structure and Dynamics of Matter (MPSD). A full application for a second research period of seven years