There are more than 524 foreigners in Rome and 635 thousand in all of Lazio [Rome region], with an average age of 34.
Analysing the data from the last 10 years in all of the region, the strong increase in the foreign population is very clear (+192%), going from 218 thousand in 2005 to 636 thousand currently.
Regarding employment, however, according to the Istat data from 2014, around 260 thousand (of whom 200 thousand in Roma), have a job.Source
Romanians are the biggest group, followed by Filipinos, so they're not all Muslims by any means. Bangladeshis are the third biggest, though. The total population of Rome is about 2.5 million.
Only around a third of these foreigners have a job, so what the hell are they doing? Why are they even allowed in? And this is just the foreigners who are there legally.