Changes After Construction
After losing its function following the Treaty of Lausanne, the building ceased to be used by the Administration of the Public Debt and, in 1933, was put into use by Istanbul High School.
During the comprehensive renovation in the mid-1980s, the existing wooden trusses were preserved; a steel truss system was installed to support the roof; and the roof was covered with semi-transparent PVC panels.
Since 2000, the roof eaves, roof towers, lead coverings, and door and window frames have undergone restoration.
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The building is also known as the Public Debt Administration Building.
The school has also been referred to as Numune-i Terakki and Istanbul High School.
The building, completed in 1897, is monumental in scale and is defined among examples supporting the transition to the First National Architectural Movement.
The building exhibits characteristics of the Neo-Classical style.
The plan scheme is organized around a wide corridor extending along the long axis, with rows of rooms on both sides; the central main staircase hall and service staircases at the ends are arranged accordingly.
The building consists of one ground floor, two full floors, and two basement levels; due to the slope of the terrain, the northern façade presents a higher floor perception.
