The European Synchrotron Light Source Workshop is the annual occasion for the storage ring community to share the status and the new developments of existing light sources in Europe as well as to report on the progress of new light sources under construction. The 26th such workshop, organized by ALBA, will be held from 27th to 29th of November at ALBA. As in previous years the focus will be on storage ring based light sources but the program could also include presentations on short wavelength (VUV, x-ray) free electron lasers. We would particularly welcome presentations and discussions on the new low emittance light sources under consideration.