This briefing paper, Promoting Open Knowledge and Open Science – Report on the current state of Repositories, presents an overview of the international repository landscape as of May 2015. The paper was produced by COAR on behalf of the Aligning Repository Networks Committee, a group of senior representatives from repository networks around the world. While originally intended for the Global Research Council (GRC), the paper has also been written with a broader audience in mind. The briefing paper is also available via the Research Councils UK site here.