Archeologists have discovered the water canal exits of Persepolis in the south wing of the Achaemenid complex in the Iranian province of Fars.
“The team found a canal below the south wing which was built during the Achaemenid era to lead water out of Persepolis,” head of the archeology team Ali Asadi told CHTN.
The soil which was dug up during Persepolis excavations over previous decades was piled up in the south wing, making it difficult for archeologists to notice water canal exits, Asadi added.
Previous phases of the surface water drainage project of Persepolis unveiled 20 meters of unknown water canals and 1,000 bas-reliefs mostly belonging to the columns of the Hundred-Columns Palace, which was once the largest monument in the complex.
Once known as the richest city under the sun, Persepolis was the ceremonial capital of this Persian Empire, which was the greatest power of the ancient world.
Cyrus the Great established Persepolis in 519 BCE as the most magnificent of the four Achaemenid capitals -- Susa, Ecbatana, Persepolis and Babylon -- which were founded in logistic locations to help Achaemenid kings efficiently administer their vast empire.
Situated 70 km northeast of modern day Shiraz in the southern Fars Province, Persepolis (Persian city) was built by Darius I and his successors over a 50-year period.
Spanning an area of over 125, 000 square meters, the Achaemenid capital was known for its stunning inscriptions, unique architecture and wooden columns made of tall Lebanese cedars and Indian teak trees.
Persepolis was registered as a UNESCO World Heritage Site in 1979. It was also one of the 80 treasures featured on the 2005 BBC series, Around the World in 80 Treasures.