The entrance to the Apartments of the Holy Mantle, which opens to the Inner Courtyard, is called the fountain Gate. It was restored during the reign of Ahmed III (1703-1730).  Above the door hangs a calligraphy, Kalima al-Tawhid (Proclamation of God’s Unity), written by the sultan, who was a gifted calligrapher. There are two lines of script, one on each side, in the shape of a tugra (sultan’s monogram). The line on the right reads “Lord of the World, Glorious Ruler,” and the one on the left reads “Devotee of the Shari’a, Sultan Ahmed.” A smaller monogram of Sultan Ahmed III is engraved above these lines. On each side of the monogram are two lantern brackets from bronze supports.

ref: Aydin, Hilmi  (2005). The Sacred Trusts (pg 17). New Jersey: The Light Publishing