Sivriada is one of the smallest islands in the Princes’ Islands group of Istanbul, located in the Sea of Marmara. Together with nearby Yassıada, it has historically been associated with isolation and exile, and is sometimes collectively referred to in local tradition as the “Philanthropia Islands,” a name reflecting their long-standing role as places of seclusion rather than occupation or settlement.
The island is essentially a rocky extension of a steep hill rising directly from the sea, reaching an elevation of approximately 90 meters. Its terrain is rugged and largely barren, with little vegetation and no permanent settlement. On the southern side of the island, there is a small natural harbor and a freshwater well, which historically supported limited human presence.
Sivriada has a long history dating back to the Byzantine period, when it was used as a place of exile for political figures and religious individuals. It was also known as a retreat for monks seeking solitude, and a monastery is believed to have existed on the island as early as the 10th century. Today, only scattered ruins and archaeological remains survive from these early periods.
During both the Byzantine and Ottoman eras, Sivriada was also used as a source of building material. Stone from the island was transported to Istanbul and used in various construction projects, including infrastructure around the Haydarpaşa Port and nearby coastal works.
One of the most tragic episodes in the island’s modern history occurred in 1910–1911, when stray dogs from Istanbul were brought to Sivriada as part of a citywide effort to control the urban animal population. Lacking sufficient food and water, many of the animals did not survive. This event has remained a somber and controversial part of the island’s history, remembered in Istanbul’s collective memory as a reflection of changing attitudes toward urban management and animal welfare at the time.
Today, Sivriada is uninhabited and largely untouched, serving as a quiet reminder of Istanbul’s layered past. With its dramatic cliffs, historical ruins, and panoramic views of the Sea of Marmara, the island forms part of the natural and historical heritage of the Princes’ Islands archipelago.
Although it is not open for regular tourism or settlement, Sivriada can be seen from passing boats and cruise routes, offering visitors a glimpse into one of Istanbul’s most isolated and historically significant small islands.