From the Wikipedia: "Çamlıca Republic Mosque in Istanbul, Turkey, is the largest mosque in Asia Minor and was inaugurated on 1 July 2016. Çamlıca Mosque is able to accommodate 37,500 people, and includes a museum, art gallery, library, conference hall, and underground parking lot. Çamlıca Mosque was designed by two female architects, Bahar Mızrak and Hayriye Gül Totu, at a cost of around TL 150 million ($66.5 million)."

On the web I found articles about the mosque being opened on special occasions, but during my visit in 2018 I found work was still going on. Still I thought it would be fun to give a preview, from the outside as entrance was not allowed for safety reasons.
In 2019 I had read that the mosque had been finished and was actually open. So I went there again and tried to give a decent impression of the finished product. Its size is awe-inspiring, and over-all I found the result quite nice. Tiles, my personal favourites, are very good, as are the coloured windows, the carpet, decorations on doors and furniture. The atmosphere also was very relaxed. The muqarnas (Wikipedia: “Sometimes called “honeycomb vaulting or “Stalactite vaulting,” the purpose of muqarnas is to create a smooth, decorative zone of transition in an otherwise bare, structural space. “) were a bit too repetitive. In general the mosque is in a fine tradition, but does not stand out, apart from its size. Its well-appointed with good views of the Bosporus, and it seems the nearby park will add to its charm. I took very many pictures, as I don’t think I’ll return often, Üsküdar has some fine mosques closer to the Marmaray stop that are more to my liking. Also for modern building one should rather visit the Marmara Univ. Fac. of Theol. Mosque. The pictures of the 2018 - unfinished - mosque I transfer to a sub-gallery.
Bus 15C brings you to it, from the Üsküdar busstation. It takes 20 minutes or so.