Gatw of the Treasury. Dolmabahçe palace, surviving until today, one of the four masonry palaces all located in Istanbul is the first and the greatest structure where Westernization changes were felt. This gate is one of two that is bigger and more gorgeous. These gates also qualify as the signs showing the power of the rulers against Western countries and the public. Gates are of critical importance as they reflect the changing approach of Ottoman rulers who always preferred to live in a simple and plain way away from flashiness. Today this gate opens onto the main road along the coast and is locked.