Yazd in the context of "Yazd province"

Zoroastrianism is considered to be the oldest religion still practiced in Iran. It is an Iranian religion that emerged around the 2nd millennium BCE, spread through the Iranian plateau, and eventually gained official status under the Achaemenid Empire in the 6th century BCE. It remained the Iranian state religion until the 7th century CE, when the Arab conquest of Persia resulted in the fall of the Sasanian Empire to the nascent Rashidun Caliphate. Over time, Zoroastrians became a religious minority amidst the Islamization of Iran, as due to persecution many fled east to take refuge in India. Some of Zoroastrianism's holiest sites are located in Iran, such as Yazd.

Today, Iran has the second largest Zoroastrian population in the world, behind only India and possibly the Kurdistan Region. The official Iranian census of 2011 recorded a total of 25,271 Zoroastrians in the country, but several unofficial accounts suggest higher figures.

The various states and civilizations in Iran (Persia) have had numerous capital cities and royal centers throughout history.

• Ahar; Pishkinid dynasty
• Anshan; pre-Achaemenid era
• Ardabil; early Safavid era, Sajid
• Asaak; Parthian era royal center
• Astara; Ispahbads of Gilan
• Alamut Castle; Nizari Ismaili state
• Amol; Ziyarid, Alavid, Marashis, Dabuyid, Bavandid, Chalavi, (Parthian Empire climate capital)
• Babylon; Achaemenid era
• Baghdad; caliphates, Jalayerid, Buyid
• Balkh; in legend, the governmental center of the Kayanian dynasty
• Bardsir; Banu Ilyas
• Basra; Jalayerid
• Bukhara; Samanid era
• Ctesiphon; Parthian, Sasanian era
• Damavand; Masmughans of Damavand
• Dinavar; Hasanwayhids
• Diyarbakır; Aq Qoyunlu
• Fuman; Dabuyid
• Farim (Perim); Bavandid
• Firozkoh; Ghurid
• Firuzkuh; Chalavi
• Shahr-e Qumis (Hecatompylos); Parthian era
• Ghazna; Ghurid, Khwarazmid, Ghaznavid
• Gor (Firuzabad); Sasanian era
• Gorgan (Astarabad); Ziyarid, Alavids
• Herat; Ghurid, Kartids, Timurid Empire
• Hulwan; Annazids
• Ij (Ig); Shabankara
• Isfahan; Ziyarid dynasty, Kakuyid Emirate, Injuid dynasty, Seljuk era, Safavid era
• Istakhr; Sasanian era
• Izeh (Idaj); Hazaraspids
• Ecbatana (later Hamadan); Median Empire, Achaemenid era, Eldiguzids, Seljuks (Greater and Iraq Seljuks)
• Kerman; Muzaffarid, Qutlugh-Khanids
• Khorramabad; Khorshidi dynasty
• Kunya Urgench; early Khwarezmid era
• Lafur; Qarinvand dynasty
• Lankaran; Talysh Khanate
• Lahijan; Karkiya dynasty
• Maragheh; Ilkhanid, Ahmadilis, Sajid
• Mashhad; Afsharid
• Merv; capital during al-Mamun's caliphate, and Taherid era, Seljuk Empire
• Mosul; winter capital during Qara Qoyunlu
• Nakhchivan; Eldiguzids
• Nishapur; Ilkhanid, Seljuq, Taherid eras
• Nisa, Turkmenistan; periodical capital of the Parthian era
• Pasargadae; Achaemenid
• Persepolis; Achaemenid ceremonial capital
• Rey (Rhagae); Median, Ziyarid, Buyid, Seljuk Empire
• Rudbar; Justanids
• Qazvin; early Safavid era
• Sabzevar; Sarbadars
• Samarkand; Samanid, Khwarazmid, Timurid era
• Shiraz; Buyid dynasty, Injuid dynasty, Muzaffarid dynasty, Salghurid dynasty, Zand dynasty
• Soltaniyeh; Ilkhanid
• Susa; Achaemenid, Parthian era
• Tabriz; Ilkhanid, Khwarezmid, Rawadid, Chupanid, Jalayerid, Eldiguzids, Kara Koyunlu, Aq Qoyunlu, early Safavid era
• Tarom; Sallarid
• Sari; Qajar, Dabuyid, Alavid, Bavandid, Marashis
• Yazd; Kakuyid, Atabegs of Yazd
• Zaranj; Saffarid Empire, Mihrabanid, Nasrid
• Tehran; Qajar era, Pahlavi era, Islamic Republic of Iran 1796–present

The Kakuyids (also called Kakwayhids, Kakuwayhids or Kakuyah) (Persian: آل کاکویه) were a Shia Muslim dynasty of Daylamite origin that held power in western Persia, Jibal and Kurdistan (c. 1008–c. 1051). They later became atabegs (governors) of Yazd, Isfahan and Abarkuh from c. 1051 to 1141. They were related to the Buyids.

Seyyed Ahmad Fardid (Persian: سید احمد فردید) (Born in 1910, Yazd – 16 August 1994, Tehran), born Ahmad Mahini Yazdi, was a prominent Iranian philosopher and a professor of Tehran University.

He is considered to be among the philosophical ideologues of the Islamic government of Iran which came to power in 1979, following the revolution. Fardid was under the influence of Martin Heidegger, the influential German philosopher, whom he considered "the only Western philosopher who understood the world and the only philosopher whose insights were congruent with the principles of the Islamic Republic. These two figures, Khomeini and Heidegger, helped Fardid argue his position."

The Atabegs of Yazd (Persian: اتابکان یزد, Atābakān-e Yazd) were a local dynasty that ruled the city of Yazd from approximately 1141 to 1319. They succeeded the Kakuyids, to whom they were linked by marriage.

An ab anbar (Persian: آب‌انبار, literally "cistern") is a traditional reservoir or cistern of drinking water in Greater Iran.