When preparing a multimedia presentation, take a moment to reflect before adding music, images, or video clips. Have you obtained permission from the copyright owner to use the item? Even featuring statuary you have photographed in front of a civic structure might not be a simple matter. The artist who created the work of art could still own the copyright even if the statues themselves have been sold. In general, unless you created a work of art, you must consider ownership issues.
Locate examples of this sort of violation on the Internet. What justification do you think those who use copyrighted material without permission would give? Do you think their arguments are valid?