Долмабахче
In Constantinople, Mesrobian was appointed as chief architect to the palace of the Ottoman Sultan, Mehmed V. Throughout his career as a chief architect to the Sultan, he was tasked to draft the restorations of some thirty Ottoman Palaces, including the famous Dolmabahçe Palace. The Dolmabahçe Palace had been neglected for thirty years and was in a state of disrepair during the reign of Sultan Abdulhamid II, who preferred to live in the Yildiz Palace instead. When the Dolmabahçe Palace was restored as an administrative center for the Sultan, a massive restoration of the building was needed. Mesrobian was subsequently employed as the chief architect of the restoration. Meanwhile, he took charge of restorations of many buildings in the Beyoğlu district of the city. At this point of his career, Mesrobian became a well-known figure for his work.