Metal windows, the soul of America’s historic commercial and civic structures, provide a peek into the past. Here are some of the companies that specialize in recreating these views of bygone eras.

Michael G. Imber designs a Georgian-inspired building at the University of Arkansas.

John Canning & Co. restores Yale’s Sterling Memorial Library’s ceiling.

Mackey Mitchell Architects restores Soldiers Memorial Military Museum.

With Benton Hall, Robert A.M. Stern Architects both respects and adds to Colgate University’s centuries-old architectural heritage.

The Robinson House is building with a storied past that gets a new lease on life as a gallery and tourist center in Virginia.

These gray slabs have been protecting roofs for centuries—we take an in-depth look at slate.

Energy conserving techniques for older buildings.

Original fixtures now shine at the Wyoming Capitol with state-of-the-art LED technology.

Building change, an interview with Elizabeth Plater-Zyberk.