Washington National Gallery of Art collection tours

Of course you can search the Washington National Gallery of Art collection by artist, title and other criteria, but you can also take one of the tours that has been set up to explore specific issues.
Just check the collection page and follow your inspiration.
Tours are grouped by general area of interest in the field of paintings, sculpture, works on paper, photographs, decorative arts and architecture.
Among the general areas: "american paintings", "british paintings", "northern european 15th-16th centuries paintings", "modern and contemporary painting and sculpture" and "european 14th-19th centuries sculpture", just to name some of them.
They focus on more specific subjects with a brief introduction and a group of works related to the topic. "Dutch still lifes and landscapes of the 1600s", "Francisco de Goya", "Mark Rothko", "Constable and Turner: british landscapes of the Early 1800s", and "18th and 19th century france: neoclassicism", are some of the tours u can take.

A Beginner's Guide to Impressionism

On the National Gallery (London, UK) website you can find a brief "Beginner's Guide to Impressionism". It will give you a quick look at Impresionism, its artists, its themes and the time this art school arose. On the guide six pages you will have the chance to see some impressionist paintings from the National Gallery collection, and if you click on them you will be taken to a page dedicated to that painting with a brief comment and the ability to zoom on the work image for a better view.