Pope Paul V commissioned __________ to provide Saint Peter's Basilica with a longer nave and a new façade

What is the name of the unique architectural feature of the Hagia Sophia?

a. the vault b. the cantilever c. the classical order d. the pendentive.

Stonehenge (fig. 15.3) is a(n) __________, or "circle of stones," that is located on Salisbury Plain in Wiltshire, England

Fill in the blank(s) with correct word