Both some of my favorite portraits of Lady Hamilton. George Romney supposedly painted her over 70 times, and went insane after he could see her no more.
"..Although she was obliged to use her legal name of Amy Lyon on the marriage register, the wedding gave her the title Lady Hamilton which she would use for the rest of her life. Hamilton's public career was now at its height and during their visit he was inducted into the Privy Council. Shortly after the ceremony, Romney painted his last portrait of Emma from life, The Ambassadress, after which he plunged into a deep depression and drew a series of frenzied sketches of Emma." (Wikipedia)
My favourite portrait of her, however, had to be Elisabeth Vigee's portrait of her as a Bacchante >>4473704
(and the other beautiful portrait of her as Ariadne, I can't find a high resolution scan of it).
"..... I had just finished the first sitting, when I saw Sir William Hamilton, the English ambassador in Naples, at the door, he requested that my first portrait in the town might be that of an exceptionally beautiful woman whom he introduced to me as Mme Hart, his mistress; she later became Lady Hamilton, and her beauty brought her great fame. Having already promised my kind neighbours, I did not want to begin this portrait until that of the Countess Scavronsky was fairly advanced. At the same time I painted another portrait of Lord Bristol, whom I encountered once again in Naples. It could be said that this man spent his entire life on Vesuvius for he climbed up the volcano every day. I painted Mme Hart as a bacchante, reposing by the side of t he sea holding a cup in her hand. Her beautiful face was very lively and formed a strong contrast with that of the Countess; she had an enormous quantity of fine chestnut hair which could cover her body completely, so she looked wonderful as a bacchante with her hair spread out."