From the Official Google Blog:
A wide range of global institutions, large and small, well-known and less traditional, are represented. Explore contemporary works at the Istanbul Modern Art Museum, admire works from the Art Gallery of South Australia (who have contributed almost 600 objects) and access the treasures of the famous Museum of Palazzo Vecchio in Italy and Princeton University. This round has also seen contributions from more unusual sources including a collection from the National Ballet of Canada, pre-Columbian art from Peru and decorative arts from China.
Now that the total number of objects online is more than 35,000, we’ve turned our attention towards thinking of different ways for you to experience the collections.
The first is a great educational tool for art students, enthusiasts or those who are simply curious. A “Compare” button has been added to the toolbar on the left of each painting. This allows you to examine two pieces of artwork side-by-side to look at how an artist’s style evolved over time, connect trends across cultures or delve deeply into two parts of the same work. Here’s an example: place an early sketch of Winslow Homer’s‘The Life Line’ from the Cooper-Hewitt, National Design Museum next to the completed painting from the Philadelphia Museum of Art. Comparing them in this way allows you to see how the artist’s vision altered (or not) over the life of the work.