Masjid al-Fath

Masjid al-Fath (Arabic: مسجد الفتح) is the largest of the group of mosques known as al-Masajid al-Sab’a (Arabic: المساجد السبعة) or The Seven Mosques.
 It is the site at which the Prophet ﷺ supplicated during the Battle of Khandaq.