Two key-note lectures and one contributed lecture by Hylleraas members at the STC 2023.

With the overall theme Quantum and Classical Dynamics in Chemistry, the 59^th STC was attended by 330 participants, predominantly from Germany, Austria, and Switzerland. While Helgaker’s Keynote Lecture was on molecular dynamics in strong magnetic fields, Pedersen’s Keynote Lecture was on laser-driven electron dynamics, a topic directly related to and inspired by this year’s Nobel Laureates in Physics. Selected after review by the organizing committee of STC, Lang’s Contributed Lecture was on the definition of molecular structure on purely quantum-mechanical grounds.