used refined fuels for lighting in order to prevent
pollution and keeping their colorful decorations and
Persepolis is a complex of structures and palaces
remaining from the Achaemenid era, built at the time of
Darius I in the fifth century BC.
No evidence of carbon black is found on the stone parts,
ancient remains and decorations of the historical palace
of Persepolis, which means its residents used refined
fuels to provide light 2500 years ago.
"The Persepolis complex is more than 125 thousand
square meter and many parts of it are roofed, therefore
lots of torches and lighting materials were surely used to
light these spaces. If they were not refined, today we
would have found lots of carbon black on the remaining
structures and items," explained head of the
restoration team of Persepolis, Hasan Rahsaz.
The Persepolis residents moreover used perfumes to sweeten
the air inside. Inscriptions of the complex provide
evidence that different plants such as censer were used to
change the air inside the palaces.
Persepolis is the most important capital of the Achaemenid
dynasty, located near Shiraz in the southern province of
Fars, which was inscribed on the UNESCO world heritage
list in 1979.