van Eyck, Jan. Portrait of Margareta van Eyck. 1439. Musea Brugge-Groeningemuseum [Groeninge Museum] ARTstor. Web 6 Aug. 2015
The best place to find images for your presentation is in the database, ARTstor. Log on to ARTstor, create a personal account and create an image group. Then view information on how to Export to Power Point
You can search ARTstor by the name of an art work, by geography, by classification (for example, architecture), or by collection (for example, Beyond the Taj). Use the Advanced Search to limit by date.
Helpful videos on using ARTstor can be found on UTube