<P> The Royal Road was an ancient highway , part of the Silk Road and the Uttara Path built in ancient South Asia and Central Asia , reorganized and rebuilt by the Persian king Darius the Great ( Darius I ) of the first ( Achaemenid ) Persian Empire in the 5th century BCE . Darius built the road to facilitate rapid communication throughout his very large empire from Susa to Sardis . Mounted couriers of the Angarium could travel 1677 miles ( 2699 km ) in seven days ; the journey from Susa to Sardis took ninety days on foot . The Greek historian Herodotus wrote , `` There is nothing in the world that travels faster than these Persian couriers . '' Herodotus 's praise for these messengers -- `` Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds '' -- was inscribed on the James Farley Post Office in New York and is sometimes thought of as the United States Postal Service creed . </P>
<P> The Royal Road was an ancient highway , part of the Silk Road and the Uttara Path built in ancient South Asia and Central Asia , reorganized and rebuilt by the Persian king Darius the Great ( Darius I ) of the first ( Achaemenid ) Persian Empire in the 5th century BCE . Darius built the road to facilitate rapid communication throughout his very large empire from Susa to Sardis . Mounted couriers of the Angarium could travel 1677 miles ( 2699 km ) in seven days ; the journey from Susa to Sardis took ninety days on foot . The Greek historian Herodotus wrote , `` There is nothing in the world that travels faster than these Persian couriers . '' Herodotus 's praise for these messengers -- `` Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds '' -- was inscribed on the James Farley Post Office in New York and is sometimes thought of as the United States Postal Service creed . </P>
what was the purpose of the royal road
what was the purpose of the royal road
to facilitate rapid communication throughout his very large empire from Susa to Sardis
to facilitate rapid communication throughout his very large empire from Susa to Sardis