As part of Whereabout Wednesdays I went to La Grande Mosquée de Paris, one of France's biggest mosques. There is a lovely garden and with a really nice tea house. www.mosqueedeparis.net/
Went to the mosquee after seeing your video, c'était trop genial! Really pretty and peaceful (needed some ignoring a certain person but after she left it was all peaceful as intended;)), loved it.
I mean, I have never been to Montparnasse or Paris before. Nor have I lived in Barbes or Chateau Rouge or Porte d'Orelans. Nor do I have family members living in France or Algeria and Morocco. So therefore I wouldn't know anything about it.
Been never there. Any good? Initially build in the 1920s to honor the Muslim troups of the Army of Africa who fought in WW1. It's actually the counterpart of the catholic cathedral Notre Dame d'Afrique and the Grande Synagouge in Algiers. And rumor goes that's it's exterritorial area of Algeria since 1957. Not that I would have anything to do with Algeria. But apparently it was a donation to the three departements of Algeria by De Gaulle and French foreign minister to then time 4 million Algerians who lived in France as part of the pacification attempt and later peace negotiations in Evian to end the War in Algeria. The war ended. Just not with the hoped-for outcome for France. And the Grande Mosqee de Paris became later property of the Republic of Algeria. However, nowadays its the religious center of almost 10 million North and Subsahara-Africans in France, UK, Spain, Italy, Germany and Benelux.