Istanbul within Istanbul Ağaoğlu is building a new Istanbul within Istanbul through the most distinguished architectural project of Europe: Maslak 1453. Towers, terrace-homes and office blocks... The project is designed to be a complete living center. Cadde 1453, squares, restaurants and cafes will offer you a new-found love of Istanbul. It is also a profitable project for the investors, where the rent will pay off their investments in no time.