The Etz Ahayim Synagogue (Hebrew: קהל קדוש עץ החיים), also known as the Ortaköy Synagogue, is synagogue located in Ortaköy, Istanbul, Turkey, on the coast near the right leg of Bosphorus Bridge.
It is unknown when the original synagogue was built, but it is estimated to be before 1703. The building also housed an academy for over one hundred years.
The synagogue was totally destroyed by fire in 1941 with only the marble Aron Kodesh remaining intact. The synagogue was subsequently rebuilt.
The synagogue serves Ashkenazi Jews and is also known as the 'Tree of Life' synagogue.