text: From the belvedere in the treasury of the palace , where the Sultan used to gaze down upon his fleet , you can look across the mouth of the Golden Horn to the modern district of Beyo lu , where multi-storey hotels rise beyond the turret of the Galata Tower .
  
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  From the belvedere in the treasury of the palace , the mouth of the Golden Horn and the district of Beyo lu are both visible .