Organized by Christian Sievers & Mathias Antlfinger/KHM together with Chaos Computer Club Cologne, taking over large parts of KHM for a weekend in May. We had over 550 visitors and around 45 speakers and performers, forming a good mixture of students, artists, hackers and makers. See http://chaos.cologne/ for the program.
Here are videos of the talks, performances and presentations: https://media.ccc.de/browse/conferences/chaoscologne/1c2/index.html or https://www.youtube.com/playlist?list=PL_IxoDz1Nq2Zo6s7JkBA48L6w3terUsFh
