King Darius the Great was 'rounding out' the empire he inherited from Cyrus the Great and Cambyses II, trying to take over the north of the Black Sea and Thrace. In doing so he became enmeshed with Macedonia and the Greek cities of mainland Greece, all of which caused him grief.
There are numerous leaders of the Persian Empire who have ruled throughout history. See the below link for a list.
to understand the Persian empire you should visit the wikipedia article about the Persian empire. Click in the related link box below to visit the article.
King Darius the Great was 'rounding out' the empire he inherited from Cyrus the Great and Cambyses II, trying to take over the north of the Black Sea and Thrace. In doing so he became enmeshed with Macedonia and the Greek cities of mainland Greece, all of which caused him grief.
Cyrus , Darius , et.al. ~ look to the related link below .
See the link in separate box below: 'Sources and related links'.
Satraps ~ look to the related link below for further information .
A map of the Persian Empire is in the link in the separate panel Sources and related links below.
Each of the Persian provincial governors was responsible to provide infrastructure. Such roads and waterways, canals, irrigation etc were coordinated on an empire-basis to ensure they linked up. A communications road also provided an east-west link.
It depends on how the question is intended. If the question is about the borders of the Empire, you can get a map of the Eastern Hemisphere and look at Egypt and Turkey in the west and Central Asia and Pakistan in the East. That area spanned the Persian Empire. Please see the Related Link with such a map. If the question is referring to buildings and cities within Persia, they would have been very impressive to the people. The buildings would be large boxes with large open spaces, collonades, and detailed carvings. Please see the Related Link with reconstructions of Persepolis, the Persian capital.
The European and Asian empires were echoes of the Alexander empire, which was itself an echo of the Assyrian and Persian empires. The European and Asian empires morphed into the nation-states of today under different political systems, so the link is very tenuous.
It was cuneiform, an example of which - from Persia - can be seen on: (See related Link). The language it depicted is Elamite, the 'official' language used for laws and government dispatches.
Darius further refined what Cyrus had previously established - Satraps who were essentially provincial governors . ~ See related link below .