This Baktiari from the Nourmak Collection is recognizable by its repeating diamond pattern. Originated by the Baktiari tribes of ancient Persia, the design is among the oldest still in popular use.

Similar to the Baktiari, but somewhat more curvilinear in its divisions, is this Mogul design from the Hamilton House Collection.

This Agra from the Suf-I-Noor collection borrows formal elements from the Sarouk, and more tribal Tree-Of-Life elements in the border, creating a versatile classic that fits many decorating styles.

This Heriz features a signature square/diamond medallion with an elaborate geometric surround. From the Tahoe Collection.