The major accomplishments achieved within the Persian Empire include:
- encouraged religious tolerance
- introduced architectural styles and farming techniques from other parts of the world
- built a vast network of roads
The Persian Empire is noted for its administrative innovations, multiculturalism, and infrastructure development, but it is not known for creating the first written laws; that is typically attributed to earlier civilizations such as the Sumerians with the Code of Ur-Nammu or the Babylonians with the Code of Hammurabi.