The Quantum Technologies Flagship, officially launched on 29 October 2018 in Vienna, is a EUR 1 billion initiative, supported by the European Commission and Member States, funding over 5,000 of Europe's leading Quantum Technologies researchers over the next ten years and aiming at placing Europe at the forefront of the second quantum revolution. Its long-term vision is to develop a quantum web, where quantum computers, simulators and sensors are interconnected via quantum communication networks. This will help kick-starting a competitive European quantum industry transforming research results into commercial applications and disruptive technologies.