Mosul in the context of "Great Zab"

Dur-Sharrukin (Neo-Assyrian Akkadian: 𒂦𒈗𒁺, romanized: Dūr Šarru-kīn, "Fortress of Sargon"; Arabic: دور شروكين, Syriac: ܕܘܪ ܫܪܘ ܘܟܢ), present day Khorsabad, was the Assyrian capital in the time of Sargon II of Assyria. Khorsabad is a village in northern Iraq, 15 km northeast of Mosul. The great city was entirely built in the decade preceding 706 BC. After the unexpected death of Sargon in battle, the capital was shifted 20 km south to Nineveh.

The Tigris (/ˈtaɪɡrɪs/ TY-griss; see below) is the eastern of the two great rivers that define Mesopotamia, the other being the Euphrates. The river flows south from the mountains of the Armenian Highlands through the Syrian and Arabian Deserts, before merging with the Euphrates and reaching to the Persian Gulf.

The Tigris passes through historical cities like Mosul, Tikrit, Samarra, and Baghdad. It is also home to archaeological sites and ancient religious communities, including the Mandaeans, who use it for baptism. In ancient times, the Tigris nurtured the Assyrian Empire, with remnants like the relief of King Tiglath-Pileser.

The Maphrian (Syriac: ܡܦܪܝܢܐ, romanized: maphryānā or maphryono), is the second-highest rank in the ecclesiastical hierarchy of the Syriac Orthodox Church, right below that of patriarch. The office of a maphrian is a maphrianate. There have been three maphrianates in the history of the Syriac Orthodox Church and one, briefly, in the Syriac Catholic Church.

The first maphrianate, called the Maphrianate of the East or the Maphrianate of Tagrit, was established in 628 to give the Syriac Orthodox Church an ecclesiastical hierarchy in the Sasanian Empire and lands outside the control of the Roman Empire. The seat of the bishop was initially at Tagrit and he ranked second in the hierarchy after the Patriarch of Antioch. Initially he used the title catholicos in direct opposition to the rival Catholicos of Seleucia-Ctesiphon of the Church of the East. The title "maphrian" first came into use around 1100. In 1156 the seat of the maphrian was moved to Mosul. The Maphrianate of the East was abolished in 1860 as a result of a decreasing number of Syriac Orthodox outside of the region of Ṭur ʿAbdin. By then it had been a merely titular see for a long time.

Basra (Arabic: ٱلْبَصْرَة, romanized: al-Baṣrah) or Basrah is a port city in southern Iraq. It is the capital of the eponymous Basra Governorate, as well as the third largest city in Iraq overall, behind Baghdad and Mosul. Located near the Iran–Iraq border, the city is situated along the banks of the Shatt al-Arab that empties into the Persian Gulf. It is consistently one of the hottest cities in Iraq, with summer temperatures regularly exceeding 50 °C (122 °F).

Built in 636 as a military camp, Basra played an important role as a regional hub of knowledge, trade and commerce during the Islamic Golden Age and is home to the first mosque built outside the Arabian Peninsula. It was a center of the slave trade in Mesopotamia, until the Zanj rebellion in 871. Historically, Basra is one of the ports from which the fictional Sinbad the Sailor embarked on his journeys. It has experienced numerous ruling shifts. In 1258, the city was sacked by the Mongols. Basra came under Portuguese control in 1526 and later fell under the control of the Ottomans as part of the Basra Eyalet, one of the provinces comprising Ottoman Iraq. During World War I, British forces captured Basra in 1914. It was incorporated into Mandatory Iraq, under the framework Mandate for Mesopotamia after 1921, which later became the independent Kingdom of Iraq in 1932.

Nimrud (/nɪmˈruːd/; Syriac: ܢܢܡܪܕ Arabic: النمرود) is an ancient Assyrian city (original Assyrian name Kalḫu, biblical name Calah) located in Iraq, 30 kilometres (20 mi) south of the city of Mosul, and 5 kilometres (3 mi) south of the village of Selamiyah (Arabic: السلامية), in the Nineveh Plains in Upper Mesopotamia. It was a major Assyrian city between approximately 1350 BC and 610 BC. The city is located in a strategic position 10 kilometres (6 mi) north of the point that the river Tigris meets its tributary the Great Zab. The city covered an area of 360 hectares (890 acres). The ruins of the city were found within one kilometre (1,100 yd) of the modern-day Assyrian village of Noomanea in Nineveh Governorate, Iraq.

The name Nimrud was recorded as the local name by Carsten Niebuhr in the mid-18th century. In the mid 19th century, biblical archaeologists proposed the Assyrian name Kalḫu (the Biblical Calah), based on a description of the travels of Nimrod in Genesis 10.

Nineveh was an ancient Near Eastern city of Upper Mesopotamia, located in the modern-day city of Mosul in northern Iraq. It is located on the eastern bank of the Tigris River and was the capital and largest city of the Neo-Assyrian Empire—and potentially the wealthiest city in the ancient world. Today, it is a common name for the half of Mosul that lies on the eastern bank of the Tigris, and the country's Nineveh Governorate takes its name from it.

It was the largest city in the world for approximately fifty years until the year 612 BC when, after a bitter period of civil war in Assyria, it was sacked by a coalition of its former subject peoples including the Babylonians, Medes, and Scythians. The city was never again a political or administrative centre, but by Late Antiquity it was the seat of an Assyrian Christian bishop of the Assyrian Church of the East. It declined relative to Mosul during the Middle Ages and was mostly abandoned by the 14th century AD after the massacres and dispersal of Assyrian Christians by Timur.

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

Mosul Eyalet (Arabic: إيالة الموصل; Ottoman Turkish: ایالت موصل, romanized: Eyālet-i Mūṣul) was an eyalet of the Ottoman Empire. Its reported area in the 19th century was 7,832 square miles (20,280 km). Although the eyalet was overwhelmingly Kurdish, the city of Mosul itself was largely inhabited by Arabs.

Tikrit (Arabic: تِكْرِيت, romanized: Tikrīt [ˈtɪkriːt]) is a city in Iraq, located 140 kilometers (87 mi) northwest of Baghdad and 220 kilometers (140 mi) southeast of Mosul on the Tigris River. It is the administrative center of the Saladin Governorate. In 2012, it had a population of approximately 160,000. Tikrit is widely regarded as the cultural capital of Iraqi Sunni Arabs, with control of the city carrying symbolic weight due to its former prestige.

Originally created as a fort during the Assyrian empire, Tikrit became the birthplace of Muslim military leader Saladin. Saddam Hussein's birthplace was in a modest village (13 km) south of Tikrit, which is called "Al-Awja"; for that, Saddam bore the surname al-Tikriti. The inhabitants of this village were farmers. Many individuals from Saladin Governorate, especially from Tikrit, were government officials during the Ba'athist period until the US-led invasion of Iraq in 2003. Following the invasion, the city has been a site of insurgency by Sunni militants, including the Islamic State who captured the city in June 2014. During the Second Battle of Tikrit from March to April 2015, which resulted in the displacement of 28,000 civilians, Iraqi government forces regained control of the city, with the city at peace since then.