Wikipedia: Suleiman Mosque - Illustrated history and description from the online collaborative encyclopedia of this grand mosque in Istanbul, built on the order of Suleiman I to a design by Sinan which reflected the nearby Hagia Sophia. - http://en.wikipedia.org/wiki/Suleymaniye_Mosque
Mosques Around the World - IslamiCity presents photographs of outstanding mosques, both historic and modern, arranged by continent. - http://www.islamicity.com/Culture/Mosques/
Wikipedia: Great Mosque of Djenné - Information on the world's largest mud-brick building, in Mali. Sections on its history, design and significance, plus pictures. - http://en.wikipedia.org/wiki/Great_Mosque_of_Djenn%C3%A9
Sinan Mosques in Istanbul - Chuck Newman's photographs of his tour around the mosques designed by the famed 16th-century architect. - http://newmanservices.com/turkey/sinan.asp
Mosque - Tore Kjeilen explains the significance of the mosque to Muslims, its history, development and use, in an article for the Encyclopaedia of the Orient. - http://i-cias.com/e.o/mosque.htm
Mosques - Great Buildings Online provides images and information on famous mosques in Turkey, Syria and North Africa. - http://www.greatbuildings.com/types/types/mosque.html
Mosque of Amr Ibn El-As - The Egyptian Tourism Ministry provides an illustrated history and description of the oldest mosque in Egypt, founded in 642 AD and rebuilt several times subsequently. - http://touregypt.net/AmrIbnMosque.htm