The San Francisco Museum of Modern Art is expanding -- in part to create space for the collection of late Gap founder Donald Fisher -- and Thursday we got the first glimpse of the new wing.

Designed by busy Norwegian firm Snøhetta, which is also at work on the museum at New York's ground zero, the addition will slip a massive, 335-foot-long cruise ship of a structure behind the museum's existing building, which was designed by Mario Botta and opened in 1995. The main entry to Botta's museum, along Third Street, will remain, but a second gateway to the museum will open up along Howard Street.