In January, 2015, Dr. Carlos A. Coello Coello attended the Dagstuhl Seminar on Understanding Complexity in Multiobjective Optimization. This was the fifth time that Dr. Coello had the honor of being invited to this important event held at a former castle, in Dagstuhl, Germany.

Below you can see some photos of the castle, the sessions, the traditional wine and cheese party, and the lyrics of the ever evolving MCDM song. There is also a photo of a quilt donated by Donald Knuth and his wife to Dagstuhl.