Excerpt:
Since 1990, October 3 has been a holiday in Germany to mark the reunification of the country. But there is another tradition that falls on October 3: it's also the day of a nation-wide open house at Germany's mosques.
The first mosque open house took place in 1997, and this year, the motto is 'The Quran - 1400 years, topical and part of everyday life.' The purpose is to celebrate the revelation of the Quran to the Prophet Muhammad 1400 years ago.
On the day of the open house, Germans - Muslims and non Muslims alike - are invited to visit mosques and Islamic cultural centers around the country. All told, over 500 sites will open their doors.