Euclid imaging data used in this work, and in which Altieri’s lens was discovered. The main panel shows a composite false colour image produced by combining the VIS and NISP data. The higher resolution broadband VIS I_E image is used to set the brightness, with the colour provided by the lower resolution NISP Y_E, J_E, and H_E passband images. The central light of the galaxy is suppressed to make the lensed arc more visible. The inset shows only the higher resolution VIS data in the central 8″ of the image, indicated by the square in the main panel. The angular scale and the physical scale at the redshift of the lens are given in each frame.