Mark Rothko's (1903-1970) iconic abstract expressionist works are renowned. Yet, his nearly 3,000 smaller paper pieces are equally groundbreaking. Robert Costa explores these at the National Gallery of Art in Washington, D.C. https://cbsn.ws/3V1gU4k | CBS Sunday Morning

Intrigued by the work of Mark Rothko? Here's a 60-second intro to this leading Abstract Expressionist painter, presented by the RA's Artistic Director Tim Marlow. There are 14 canvases by Rothko currently hanging in our galleries – look out for more 60-second guides on some of the other iconic artists in the show coming soon. http://www.royalacademy.org.uk/exhibition/abstract-expressionism | Royal Academy of Arts