There is an escalator in the Great Synagogue of Yerushalayim that is operative every Shabbos and Yom Tov. It goes from the ground main floor all the way up to the top floor of the Ezrat Nashim. Everyone uses it as there are about 4 or 5 flights of stairs to get up to the Ezrat Nashim. It is on continuously during the times of davening.
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