The European Symposium on Algorithms (ESA) is an international conference covering the field of algorithms. It has been held annually since 1993, typically in early Autumn in a different European location each year. Like most theoretical computer science conferences its contributions are strongly peer-reviewed; the articles appear in proceedings published in Springer Lecture Notes in Computer Science. Acceptance rate of ESA is 24% in 2012 in both Design and Analysis and Engineering and Applications tracks.