Persepolis
Darius I built the greatest palace at Persepolis on the western side of platform. This palace was called the "Apadana". The King of Kings used it for official audiences. The work began in 518 BC, and his son, Xerxes I, completed it 30 years later. The palace had a grand hall in the shape of a square, each side long with seventy-two columns, thirteen of which still stand on the enormous platform. Each column is high with a square Taurus (bull) and plinth. The columns carried the weight of the vast and heavy ceiling. The tops of the columns were made from animal sculptures such as two-headed lions, eagles, human beings and cows (cows were symbols of fertility and abundance in ancient Iran). The columns were joined to each other with the help of oak and cedar beams, which were brought from Lebanon. The walls were covered with a layer of mud and stucco to a depth of 5 cm, which was used for bonding, and then covered with the greenish stucco which is found throughout the palaces.
History of Syria
Persian dominion ended with the conquests of the Macedonian Greek king, Alexander the Great in 333-332 BCE after the Battle of Issus which took place south of the ancient town Issus, close to the present-day Turkish town of Iskenderun. Syria was then incorporated into the Seleucid Empire by general Seleucus who started, with the Seleucid Kings after him, using the title of "King of Syria". The capital of this Empire (founded in 312 BCE) was situated at Antioch, then a part of historical Syria, but just inside the Turkish border today as well.
A series of six wars, Syrian Wars, were fought between the Seleucid Empire and the Ptolemaic Kingdom of Egypt, during the 3rd and 2nd centuries BCE over the region then called Coele-Syria, one of the few avenues into Egypt. These conflicts drained the material and manpower of both parties and led to their eventual destruction and conquest by Rome and Parthia. Mithridates II, King of Parthian Empire, extended his control further west, occupying Dura-Europos in 113 BCE.
By 100 BCE, the once formidable Seleucid Empire encompassed little more than Antioch and some Syrian cities. In 83 BCE, after a bloody strife for the throne of Syria, governed by the Seleucids, the Syrians decided to choose Tigranes the Great, King of Armenia, as the protector of their kingdom and offered him the crown of Syria.