Roland Bacon, research director of CNRS at the Centre de Recherche Astrophysique de Lyon (CRAL-UMR5574), has received the Manne Siegbahn Medal on the 11th October 2018. He gave the Manne Siegbahn Memorial Lecture entitled Integral field spectroscopy and the exploration of the high redshift Universe at the University of Stockholm. Started in 1993, the Manne Siegbahn Memorial Lectures are supported by the Royal Swedish Academy of Sciences through its Nobel Institute for Physics