On the chapel's altar wall is Michelangelo's tempestuous Last Judgment, begun 23 years after the ceiling's completion in 1512, when he was 60 and imbued with deep religious soul-searching.
The Last Judgement was the final piece of artwork made by Michaelangelo before he passed away. 
mnli hypothesis: The Last Judgement was the final piece of artwork made by Michaelangelo before he passed away.  premise: On the chapel's altar wall is Michelangelo's tempestuous Last Judgment, begun 23 years after the ceiling's completion in 1512, when he was 60 and imbued with deep religious soul-searching.