The Mihrimah Sultan mosque in Edirnekapı (in the Fatih district) is one of two mosques built for the daughter of Süleyman the Magnificent. The other is in Üsküdar, on the Asian side of Istanbul. Both mosques were designed by Mimar Sinan, the master Ottoman architect. Note the large number of windows in this mosque. Read more in this earlier post. The exterior looks like this.
Mihrimah Sultan Camii is in Üsküdar (a district of Istanbul on the Asian side). Another grand Ottoman mosque designed by Mimar Sinan, completed in 1548 (and recently restored). This is the first of two mosques built for Mihrimah Sultan (Ottoman princess, an interesting character in Ottoman history), daughter of Süleyman the Magnificent. More info here and here.