Original: The Treaty of Berlin was the final act of the Congress of Berlin ( June 13-July 13 , 1878 ) , by which the United Kingdom , Austria-Hungary , France , Germany , Italy , Russia and the Ottoman Empire under Sultan Hamid revised the Treaty of San Stefano signed on March 3 of the same year .
Simplified: The Treaty of Berlin was a part of the Congress of Berlin ( June 13-July 13 , 1878 ) . In it , the United Kingdom , Austria-Hungary , France , Germany , Italy , Russia and the Ottoman Empire wrote the Treaty of San Stefano .