[cnn-photo-caption image=http://i.cdn.turner.com/cnn/2010/WORLD/meast/02/05/iran.unrest/story.ahmadinejad.afp.gi.jpg caption="President Mahmoud Ahmadinejad has isolated Iran from the international community" width=300 height=169]
Iran will this week celebrate the 31st anniversary of the Islamic Revolution - a day that marked the end of the country's western-backed monarchy and the start of an Islamic republic.
Some experts say the revolution was also a catalyst for the spread of Islamic fundamentalism throughout the Middle East and South Asia.
This key date in Iran's history comes amid protests by the opposition after last year's disputed presidential election won by incumbent, Mahmoud Ahmadinejad.
The so-called Green Movement has been protesting for social justice, freedom and democracy in demonstrations throughout the country since the June polls - using slogans that are often identical to those heard during the 1979 Islamic revolution.
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