There are over 3,000 species of lichen in Iran, with 500 to 700 varieties making ancient monuments their home. Some of the species at Persepolis were more than 1,700 years old.

Conservationists at Persepolis, Iran's most iconic ancient site, are waging a delicate battle against an unlikely adversary: ...

Persepolis, Old Persian Parsa, or modern Takht-e Jamshid is an ancient capital of the kings of the Achaemenian dynasty of Iran (Persia), located about 50 km northeast of Shiraz in the Fars region of ...

Conservationists at Persepolis, Iran’s most iconic ancient site, are waging a battle against an unlikely enemy. They are fighting lichens, organisms that grow on surfaces like stone and can ...