The specialty of Allegri was "putti" -- tumbling, tumultuous, tricksy putti.
They are called 'putti', which translates 'little boy', in Italian.
A realistic life-sized mouse may be seen in one place, just as if it had run out to inspect the work; and the numbers of little tipsy "putti" who disport themselves in all attitudes, in perilous positions on narrow ledges, are full of merry humour.
Think of India and Pakistan, only with demons and putti instead of Sikhs and nukes.
Crivelli's painting may well be a masterpiece, but, as with so many of his depictions of Christ, it is unclear what purposes of piety or devotion are served by his unflinching, almost gruesome, renderings of a sallow corpse that is propped up by two ugly putti and whose arms are marked by anemic traceries of arteries and veins.
There is even one with a tiny naked man urinating on a large initial letter, surrounded by putti and a pair of fornicating goats.
Grumbles and moans emanate from my man, my lover, the most eternally romantic of souls, at the very first signs of cherubs, putti, Cupids, roses and hearts.
In the centre we see the Divine Infant embracing the Cross - while putti show forth the instruments of the Passion - and conquering with it death and sin, symbolised by the skull of Adam and the snake.
Guardian angels were dedicated workers, but they weren't sweet little putti sitting on your shoulder.