It is not easy to find good Islamic images and clip art that are free. I found lots of sites that charge a lot for images. Though the images were beautiful and very nicely done, the prices were not realistic for church communicators who want to create materials either in print, PowerPoint or on the web for the upcoming Muslim festival of Ramadan or any time that your church wants to teach about the Muslim religion.
On the other hand, many of the sites that say they are "free" really aren't or have so many rules, regulations and usage guidelines they are unrealistic.
The video below will give you a tour and preview of some sites that have good quality, respectful and correct images. In addition all of them are FREE and they don't have restrictive usage guidelines. Below the video are three links. There is a fourth site illustrated, but the link I had no longer works and I do apologize for that in the video.
The click-able list to the sites shown:
Link to Microsoft.com images for Ramadan
Ramadan images from Wikipedia Commons
One of the best sites for authentic Islamic images *** Be sure to scroll down below the cards for the lists of image sets, very well done, authentic: