The purpose was to get the British to repeal those acts.
Ziggurats.
The mesopotamia region was famous for Ziggurats. Some of the most famous Ziggurats of this region are known as The Great Ziggurat of Ur and Khorasabad. These structures looked like gigantic pyramids and had the form of hundreds of steps. They were not considered places of worship. Instead they were merely believed to house gods. That is the reason why sacrifices were made here and offerings to appease the god were made here too. This was a tradition that went on during the 3rd millennium BC.
In a general sense, it was because of the oppression that Britain had put over the colonies that led to the Declaration of Independence. Some of the many factors included tax impositions, the Boston Massacre, Coercive Acts, and Common Sense by Thomas Paine.
Moreover, the declaration was written by a committee of five including Thomas Jefferson (primary author), John Adams, Benjamin Franklin, Roger Sherman, and Robert Livingston and ratified on July 4, 1776 in Philadelphia.
