The ancient Romans used the raw ingredient pozzolana to make cement in Italy because it was available there. 

All Mycenaean Civilization City States 1400–1100 BCE were a unified nation under one king. 

In the Gothic Period the cathedrals used barrel vaults instead of ribbed vaults because they were too hard to build.

Identify this column. 

What was the primary purpose of Stonehenge? 

The monastery plan at St. Gall built in 817 AD by the Benedictine order was a failure and was never constructed again. 

According to tradition the Kaaba was built by Ibrahim (Abraham).

The blue mosque is called that because of the blue colored tiles use in the interior.

A basic component of ancient Japanese design for their residential buildings is the tatami rice straw mat which is also used to sleep on.

The Romans built aqueducts like the one a t Pont du Gard, in Nimes France 20-16 BCE to provide water for their cities all over the empire.