From 18 to 22 September 2023, the second Scientific Retreat of the MPQC took place at Schlossgut Oberambach, Münsing, Germany. Besides reports from all seven projects, Silvia Vignolini, MPI for Colloids and Interfaces, and Robert Hickey, PennState University, gave inspiring talks. The meeting was concluded by two talks by our directors Peter Fratzl and Dietmar Hutmacher and an exciting discussion with two members of our SAB. See you next year in Australia again!