In 2019 I received a copy of a book I had contributed several pictures to (including the front page), Ottoman Baroque by Ünver Rüstem. Of course I read it, but even after a superficial scanning of its structure I found, to my horror, that even after 60 visits to Istanbul there were a few mosques, baroque ones and fine examples at that, that I had never spotted, let alone visited. So during my 61st visit I corrected this, and the Büyük Selimye Mosque (Great Mosque for Selim) is one of them. It was only slightly further than my furthest incursions into Usküdar. I had been pretty close when visiting Harem, which may be the nearest stop if you come by ferry, but it was uphill and I simply did not bother.

It is a fine mosque, well worth a visit. Mr. Rüstem describes it in detail, but as I here just want to present pictures I quote from the Wikipedia: ”Big Selimiye Mosque (Turkish: Büyük Selimiye Camii), often known simply as Selimiye Mosque, is situated in the district of Üsküdar in İstanbul, Turkey, right across the Selimiye Barracks. The mosque was commissioned by Ottoman Sultan Selim III (reigned 1789–1807) and completed in 1801, however its main architect is unknown.

The Big Selimiye Mosque has a western style, a wide courtyard and four entrance doors. After the completion of the mosque, the original minarets were thought to be too thick, and later shaved.
The mosque is seen as a masterpiece of carpentry and marble work. The dome is 14.6 m (48 ft) wide, has five windows and supported by four half domes. The Big Selimiye Mosque has a "muvakkithane" for keeping prayer times and a water fountain. “ I promise to add some pictures to WikiCommons, but that may take a while. As for the “western style”, there is a lot more to say about that, read the book. And note that the Selim here is Selim III, there is another Selim mosque, but that is by Selim I or Yavuz Selim. A beauty also, but much, much earlier.