Cluster density distribution as a function of redshift for the CLASSIX galaxy clusters covering the sky at |b_II|≥20° for a minimum luminosity of 10⁴² erg s⁻¹ (0.1–2.4 keV). The density distribution has been normalised by the local mean cluster density based on the average cluster luminosity function (Böhringer et al. 2020). The green open diamond shows the result if the region of the Virgo cluster is not excluded from the analysis.