On the occasion of the Optics and Optoelectronics 2007 Congress (16-19 April 2007) Professor Theodor Hänsch, Nobel Prize Laureate in Physics in 2005, visited the PALS laboratory (see A decade of PALS) and received De Scientia et Humanitate Optime Meritis Medal. The founder of laser spectrometry and laser frequency comb techniques, which could lead to a detection of gravitational waves as well as holographic television, have been working on laser atomic clock as well as a laser spectrometry of hydrogen atom during last decade. and Lenka Kovaříková.