Rey, Iran in the context of Tehran

The Ghaznavid dynasty (Persian: غزنویان Ġaznaviyān) was a Persianate Muslim dynasty of Turkic mamluk origin. It ruled the Ghaznavid Empire or the Empire of Ghazni from 977 to 1186, which at its greatest extent, extended from the Oxus to the Indus Valley. The dynasty was founded by Sabuktigin upon his succession to the rule of Ghazna after the death of his father-in-law, Alp Tigin, who was an ex-general of the Samanid Empire from Balkh.

Sabuktigin's son, Mahmud of Ghazni, expanded the Ghaznavid Empire to the Amu Darya, the Indus River and the Indian Ocean in the east and to Rey and Hamadan in the west. Under the reign of Mas'ud I, the Ghaznavid dynasty began losing control over its western territories to the Seljuk Empire after the Battle of Dandanaqan in 1040, resulting in a restriction of its holdings to modern-day Afghanistan, Pakistan and Northern India.

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

Bahrām Chōbīn (Persian: بهرام چوبین) or Wahrām Chōbēn (Middle Persian: 𐭥𐭫𐭧𐭫𐭠𐭭; died 591), also known by his epithet Mehrbandak ("servant of Mithra"), was a nobleman, general, and political leader of the late Sasanian Empire and briefly its ruler as Bahram VI (r. 590–591).

Son of general Bahram Gushnasp and hailing from the noble House of Mihran, Bahram began his career as the governor of Ray, and was promoted to the army chief (spahbed) of the northwestern portions of the empire after capturing the Byzantine stronghold of Dara, fighting in the war of 572–591. After a massive Hephthalite-Turkic invasion of the eastern Sasanian domains in 588, he was appointed as the spahbed in Khorasan, beginning a campaign that ended in a decisive Iranian victory.

The Shāh Abdol-Azīm Shrine (Persian: شاه عبدالعظیم; Arabic: مرقد الشاه عبد العظيم الحسني) is a Twelver Shi'ite funerary monument and religious complex, located in Rey, in the province of Tehran, Iran. The complex contains the tomb of ‘Abdul ‘Adhīm ibn ‘Abdillāh al-Hasanī (aka Shah Abdol Azim). Shah Abdol Azim was a fifth generation descendant of Hasan ibn ‘Alī and a companion of Muhammad al-Taqī. He was entombed here after his death in the 9th century CE.

Adjacent to the shrine, within the complex, are the mausolea of Imamzadeh Tahir (son of the fourth Shia Imam Sajjad) and Imamzadeh Hamzeh (brother of the eighth Twelver Imām - Imām Reza).

Abd al-Rahman ibn Muhammad ibn al-Ash'ath (died 704), commonly known as Ibn al-Ash'ath after his grandfather, was a prominent Arab nobleman and military commander during the Umayyad Caliphate, most notable for leading a failed rebellion against the Umayyad viceroy of the east, al-Hajjaj ibn Yusuf, in 700–703.

Ibn al-Ash'ath was a scion of a noble family of the Kinda tribe that had settled in the Arab garrison town of Kufa in Iraq. He played a minor role in the Second Fitna (680–692) and then served as governor of Rayy. After the appointment of al-Hajjaj as governor of Iraq and the eastern provinces of the Caliphate in 694, relations between al-Hajjaj and the Iraqi tribal nobility quickly became strained, as the policies of the Syria-based Umayyad regime aimed to reduce the Iraqis' privileges and status. Nevertheless, in 699, al-Hajjaj appointed Ibn al-Ash'ath as commander of a huge Iraqi army, the so-called "Peacock Army", to subdue the troublesome principality of Zabulistan, whose ruler, the Zunbil, vigorously resisted Arab expansion. In 700, al-Hajjaj's overbearing behaviour caused Ibn al-Ash'ath and the army to revolt. After patching up an agreement with the Zunbil, the army marched back to Iraq. On the way, the mutiny against al-Hajjaj developed into a full-fledged anti-Umayyad rebellion and acquired religious overtones.

Abū Bakr al-Rāzī, also known as Rhazes (full name: أبو بکر محمد بن زکریاء الرازي, Abū Bakr Muḥammad ibn Zakariyyāʾ al-Rāzī), 864 or 865 – 925 or 935 CE, was a Persian physician, philosopher and alchemist who lived during the Islamic Golden Age. He is widely regarded as one of the most important figures in the history of medicine, and also wrote on logic, astronomy and grammar. He is also known for his criticism of religion, especially with regard to the concepts of prophethood and revelation. However, the religio-philosophical aspects of his thought, which also included a belief in five "eternal principles", are fragmentary and only reported by authors who were often hostile to him.

A comprehensive thinker, al-Razi made fundamental and enduring contributions to various fields, which he recorded in over 200 manuscripts, and is particularly remembered for numerous advances in medicine through his observations and discoveries. An early proponent of experimental medicine, he became a successful doctor, and served as chief physician of Baghdad and Ray hospitals. As a teacher of medicine, he attracted students of all backgrounds and interests and was said to be compassionate and devoted to the service of his patients, whether rich or poor. Along with Thābit ibn Qurra (836–901), he was one of the first to clinically distinguish between smallpox and measles.

Deir-e Gachin Caravansarai (Persian: کاروانسرای دیر گچین) is a historic caravansarai in Iran, located in the center of Kavir National Park. Due to its historical significance and unique features, it is sometimes called the "Mother of Iranian Caravanserais." Situated in the Central District of Qom County, it lies 80 kilometers northeast of Qom (60 kilometers along the Garmsar Freeway) and 35 kilometers southwest of Varamin. This monument was added to Iran's National Heritage List on 23 September 2003.

Originally built during the Sasanian era, the caravanserai underwent restorations and reconstructions during the Seljuk, Safavid, and Qajar eras. Its current form dates back to the Safavid era. Deir-e Gachin Caravanserai is located on the ancient route from Ray to Isfahan.