One of the most intriguing monuments still standing in Iraq is the Ziggurat at Ur. A ziggurat is a colossal stepped platform; and it is thought that ziggurats supported temples at their tops. These ziggurats were built during the third millennium B.C. Archaeologists don’t know for certain what the purpose of these ziggurats was; however, it is speculated that they had some connection with religion. There are several ziggurats visible throughout Iraq, the most famous of which is the ziggurat at Ur in the south of Iraq. The core of the ziggurat at Ur was constructed using mud bricks which were then covered with baked bricks. The mud bricks were made out of mud and reed; the reed was pressed into moulds that had been left to dry in the sun. Each brick measured around 25 x 16 x 7 centimeters and weighed around 4.5 kilograms.