Hagera Synagogue, Shaarei Hessed, Synagogue and heritage site in Shaarei Hessed, Jerusalem, Israel.

Hagera Synagogue is a two-storey synagogue on Bar Zakkai Street in the centre of Jerusalem's Shaarei Hessed neighbourhood. It was founded by Rabbi Ephraim Shmuel Lerner-Peperman and named after the Vilna Gaon. The main entrance is concealed behind a concrete wall built during the 1948 War of Independence, and the courtyard is enclosed by a metal fence bearing the symbols of the tribes and biblical verses.

Founded in the second decade of the 20th century by Rabbi Ephraim Shmuel Lerner-Peperman, who raised funds from the neighborhood's Perushim followers of the Vilna Gaon, the synagogue was named after the Gaon. For about two decades it had a single floor; a second was added in the 1930s. During the 1948 War of Independence a concrete wall was built across the main entrance.

The prayer rite used here became known as the Shaarei Hesed rite, followed in many communities. The founder, Rabbi Ephraim Shmuel Lerner-Peperman, led services on festivals and the High Holy Days and read the Torah until his death. The courtyard to the north, with a sealed cistern at its centre, hosted the neighbourhood's wedding and engagement ceremonies for decades.

The synagogue stands on Bar Zakkai Street in the centre of Shaarei Hessed. The main entrance is concealed behind a concrete wall put up during the 1948 War of Independence, so look for the opening beside it. A small sundial built by the clockmaker Moshe Shapira hangs to the left of the front, used for over seventy years by the vatikin minyan.

The synagogue is the oldest in Israel named after the Vilna Gaon; a second Gaon synagogue was founded in Tel Aviv in the 1930s. In 2020, descendants of founder Rabbi Ephraim Samuel Lerner-Peperman, Rabbi Ephraim Samuel Neuman and Hanoch Berkovitz, established a Gaon synagogue on Rabbi Shach Street in Beitar Illit.