To get a wallpaper of a mosque for your computer desktop, go to DesktopNexus.com and enter "mosque" in the search text box at the top of the page. On the search results page, click the image you want, and click the Download Now button to display a large image.
Desktop Nexus automatically detects the best image size for your computer desktop. Right-click on the image and select Set as Desktop Background to set it as your desktop wallpaper. Alternatively, you go to WallpapersCraft.com and enter "mosque" in the search text box at the top of the page. Click an image you want on the search results page to see all the available sizes and resolutions.