 With the declaration of the Republic, the school moved to the Fuat Paşa Mansion in Beyazıt and its name was changed to İstanbul Erkek Lisesi (Istanbul Boys' High School) in 1923.On Atatürk’s instructions, the school moved to the building of the former "Düyun-u Umumiye (Council of Ottoman Revenues and Debts Administration)" in 1933.During the Second World War the German education was suspended in 1942.