The image is a composite of R (MOSAIC@CTIO, blue channel), z' (MOSAIC@CTIO, green channel) and K (SOFI@NTT, red channel) images of a cluster at z=1.05 discovered by the XMM-LSS consortium. Contours mark  X-ray isophotes (wavelet filtered). Green circle mark spectroscopic members. Note the common red color of spectroscopically confirmed members. The field of view is 3.3 x 2.7 arcmin.