Complex sentence: Enrico's tomb is in the apse, and he had himself painted into the Last Judgment presenting a model of the chapel to the Virgin, which suggest that he was more concerned about his own spiritual well-being.
Split into simpler sentences: Enrico's tomb is in the apse, and he is also portrayed in the Last Judgment presenting a model of the chapel to the Virgin. Some believe this suggests he was more concerned about his own spiritual well-being.