The mosque opened its doors to worshippers on Monday.
With this, Athens finally shakes off its infamous reputation as the only European Union capital with no mosque.
The mosque's first imam is Zaki Mohammed, 49, a Greek citizen of Moroccan origin.
The decision to build a mosque in Athens was first made in 2006, with a budget of €887,000 ($1.04 million), but bureaucratic hurdles, protests by far-right groups, and legal challenges stalled the process.
Until today, the half-million Muslim faithful in the city had to resort to dingy basements and unsanitary locations to meet and perform prayers.
