At Friday prayers and across Athens, Muslims gather in underground, cramped prayer rooms.
The makeshift facilities are illegal but this huge community faces no other option. Athens, a metropolis on the edge of the Muslim world, is one of the few EU capitals without a mosque.
Since Greece gained independence from the Ottoman Empire in 1832, no government has allowed a mosque to be built in the city. It was seen by many as "un-Greek" - out of place in a country in which much more than 90% of the population are Orthodox Christians.