LOFAR Radio contours of the diffuse radio emission in A1213 at 144 MHz (red, HPBW = 20″ × 20″, noise level is 0.15 mJy beam⁻¹, thin contour levels at −0.5 mJy beam⁻¹, thick contour levels at 0.5, 2, 8, 32, 128, and 1024 mJy beam⁻¹) and VLA contours at 1.4 GHz (black, as in Fig. 3), superimposed to the smoothed XMM-Newton image in the energy band 0.7−1.2 keV. Yellow labels highlight prominent galaxies mentioned in the text.