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01. Quba Mosque, Saudi Arabia
http://ritemail.blogspot.com/2011/02/10-oldest-mosques-in-world.html
First Built: 622
The designation of the oldest mosque in the world requires careful use of definitions, and must be divided into two parts, the oldest in the sense of oldest surviving building, and the oldest in the sense of oldest mosque congregation. Even here, there is the distinction between old mosque buildings that have been in continuous use as mosques, and those that have been converted to other purposes; and between buildings that have been in continuous use as mosques and those that were shuttered for many decades. In terms of congregations, they are distinguished between early established congregations that have been in continuous existence, and early congregations that ceased to exist (wikipedia). 09 More after the break...
02. Al-Masjid al-Nabawi, Saudi Arabia

First Built: 622

03. Masjid al-Qiblatain, Saudi Arabia


First Built: 623

04. Jawatha Mosque, Saudi Arabia


First Built: 629

05. Masjid al-Haram, Saudi Arabia


First Built: 638

06. Great Mosque of Kufa, Iraq


First Built: 639

07. Mosque of Uqba, Tunisia


First Built: 670

08. Imam Hussain Mosque, Iraq


First Built: 680

09. Al-Aqsa Mosque, Jerusalem


First Built: 705

10. Al-Zaytuna Mosque, Tunisia