Architecture

• How One Family Built America's Public Palaces

  The National Building Museum in Washington, D.C., has a new exhibit about the soaring tile vaults built by a famous father-son team. The Guastavinos came to this country from Spain in the late 1800s, and left their mark on some of America's most important public spaces.

• Presidential Libraries Inspire Design Of George W. Bush Center

  On Thursday, the George W. Bush Presidential Library and Museum is dedicated on the campus of Southern Methodist University in Dallas, Texas. David Greene talks to former first lady Laura Bush about the library and life after the White House.

• Trees On Top Of Skyscrapers? Yes! Yes, Say I. No! No, Says Tim

  Two residential towers, dense with trees, will have their official opening later this year in downtown Milan. Blogger and critic Tim De Chant thinks it's high-time we stop planting trees on skyscrapers. Krulwich disagrees.

• Trying To Preserve What's Left Of Manhattan's Little Syria

  Preservationists are trying to protect the last vestiges of New York's Little Syria. They're seeking historic landmark status for a few buildings in Lower Manhattan. That's all that's left of what was once a thriving neighborhood, and arguably the center of Arab-American life.