I assume that you want a picture of this poem to use during a presentation you are making to your class about this excellent ballad. Well, there is one famous painting by Waterhouse, who is well known for his depiction of heroines such as The Lady of Shallot, Ophelia and also the two central characters of this poem. I have included a link to it below. It is the first link, and should hopefully take you to the picture that shows the knight being tempted and drawn into the woman's entracing beauty. It would be a great picture to have displayed on powerpoint or something like that whilst you are giving your presentation. Good luck and I hope it goes well!