Jahrom (, also known as Jahrūm) is a city and capital of Jahrom County, Fars Province, Iran. At the 2016 census, its population was 141,634. Jahrom is the largest city in south of Fars Province and the second one in whole province. Jahrom is one of the historical cities of Iran. The founder of the city of Jahrom, Artaxerxes I of Persia, the son of Xerxes I, the fifth Achaemenid king. Ferdosi has mentioned Jahrom many times in Shahnameh, especially in the stories related to Ardashir I. There are many ancient monuments and tourist attractions in Jahrom, Such as Sangtarashan cave, Jameh Mosque of Jahrom, Jahrom bazaar, Khan school and fire temple of Jahrom (Qadamgah). Jahrom is located southeast of Shiraz, the capital of Fars Province. Jahrom has a hot semi-arid climate, the average rainfall is about per year, and the average temperature is about . The average height of Jahrom is about above sea level. The majority of people in Jahrom are Persians and Shia Muslims. Jahrom, with several universities, hospitals and medical centers, is one of the academic and medical hubs of southern Iran. Jahrom has two industrial towns, a special economic zone, a dry port, a petrochemical plant, an international airport, an IRIB center, customs and a combined cycle power plant. Jahrom has special governorate and the municipality of the city is the second municipality in Fars province in terms of history of establishment and degree of municipality after Shiraz. Jahrom's economy is based on agriculture and industry, and its most important agricultural products are dates and citrus. Jahrom produces 1.2% of the world's dates and 6% of its citrus fruits every year. Jahrom International Airport serves the city. Name There are three theories about the name Jahrom. Based on Kar-Namag i Ardashir i Pabagan, in which Jahrom is mentioned as "Zarham"; It is probable that Jahrom means "green space". Based on Ahmad Kasravi, the late Iranian historians and philologist, the name Jahrom can be analyzed to render a "warm-place". Jahrom consists of "Ja" and "Hrom", Ja means "place" and "Hrom" in Avestan means "high and forbidden fortress", which is other name of the city of Barzeh (the current Takht-e Soleymān) In Iranian Azerbaijan, near the city of Maragheh. Nicknames "Green umbrella" is a nickname of Jahrom due to the resemblance of the huge masses of palm trees of Jahrom to green umbrellas. "Dar ol-Momenin" is the