Via AP:
Tens of thousands of Muslim men knelt shoulder-to-shoulder in prayer on the freezing streets of Moscow on Sunday to celebrate the religious holiday of Eid al-Adha.
Estimates of the number of Muslims living or working in the Russian capital run from 2 million to as high as 5 million, but the city has few mosques.
Police said 170,000 people celebrated the holiday in Moscow, including 80,000 who gathered on the street outside what was once the main mosque
(source)