Between 2011 and 2016, eight projects have been working towards the next generation supercomputer: CRESTA, DEEP and DEEP-ER, EPiGRAM, EXA2CT, Mont-Blanc (I + II) and Numexas. The challenges they addressed were manifold: innovative approaches to algorithm and application development, system software, energy efficiency, tools and hardware design took centre stage. Thanks to their collaborations, they also started developing a European Exascale Community. This brochure summarises their achievements and the status of the European HPC ecosystem.