In an Artist's Studio 

'In an Artist’s Studio‘ by Christina Rossetti is a standard Italian or Petrarchan sonnet that is made up of fourteen lines and can be separated into one set of eight lines, called an octave, and one set of six lines, called a sestet. The first collection of lines presents the basis of the story or problem, and the final six provide a conclusion or answer.
In this particular instance, the first part of the poem describes the visual depiction of the artist’s obsession over a woman, while the second set shows how he has been consumed mentally by her image and by a happier time in his life.