The ark is known in Hebrew as the aron kodesh or aron ha-kodesh ("holy ark") by the Ashkenazim and as the heikhal ("sanctuary") among Sefardim. Aron kodesh comes from Hebrew אָרוֹן קׄדֶש ʼārōn qōdeš (i.e. aron kodesh), Holy Ark. This name is a reference to the ’ārōn haqqōdeš, the Hebrew name for the Ark of the Covenant which was stored in the Holy of Holies in the inner sanctuary of both the ancient Tabernacle and the Temple in Jerusalem. Similarly, Hekhál, also written hechal, echal or heichal — and sometimes also Echal Kodesh (mainly among Balkan Sephardim) comes from Hebrew הֵיכָל [hēkhāl] ‘palace’, was used in the same time period to refer to the inner sanctuary. The hekhal contained the Menorah, Altar of Incense, and Table of the Showbread.
Most arks feature a parokhet (curtain) placed either outside the doors of the holy ark (Ashkenazi and Mizrachi custom) or inside the doors of the ark (Spanish and Portuguese and Moroccan Sephardi custom).
In some ancient synagogues, such as the fifth-century synagogue in Susya, the Torah scroll was not placed inside the synagogue at all, but in a room adjacent to it, signifying that the sacredness of the synagogue does not come from the ark but from its being a house of prayer. The Torah was brought into the synagogue for reading purposes.
A mobile ark at the Western Wall in Jerusalem
Freestanding ark made in Modena, Italy in 1472
The ark of the 19th century Spanish Synagogue of Prague, Czech Republic
Ark of the Grande synagogue de la Paix, constructed in the 1950s
The 1981 Hecht Synagogue uses two alcoves on either side of a window as arks
- Wischnitzer, Rachel, and Bezalel Narkiss (2007). "Ark." Encyclopaedia Judaica. 2nd ed. Vol. 2. Detroit: Macmillan Reference USA. p. 463-464. Available online via Jewish Virtual Library; retrieved 2019-05-20.
- "The Holy Ark: Aron Hakodesh". Chabad.org. Retrieved 2019-05-20.
- "Ark". The Concise Oxford Dictionary of World Religions. Retrieved via Encyclopedia.com, 2019-05-20.