India, April 10 -- The building changes over the course of the day. At peak sunlight, the roof of the terrace expands. The edges loosen from the concrete and extend outward.

This, of course, is impossible. A building cannot shift its shape. And yet it appears to do just that. Thanks to the way it is designed, especially in relation to daylight and shadows.

This shifting terrace feels like a suitable reason to revisit the building today. As this day Delhi marks the intersection of two milestones: the 114th birth anniversary of architect Joseph Stein with the 75th year of Triveni Art Gallery, the first major Delhi building that Stein designed.

Triveni Kala Sangam must rank among Delhi's most wondrous works of architecture. It houses a mu...