Or you can also use a image viewer widget from the appstore to show an image from a url.
How about just using the HTMLSnippet widget and adding the URL into an HTML img tag src attribute?
For example - add the following in the Contents box of the widget.
<img src="https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcSKk_LUJxMbliY6BYDSgzcCb3C4j7ag1w_jlDApo2rT6wAlaVAt" />
Thank you very much, I will try with your suggestion :)