What Is a Synagogue? A Building That Replaced a Temple

The layout varies enormously by period and region and a small number of elements are constant:

• •The ark, a cabinet holding the Torah scrolls, placed on the wall facing Jerusalem, which orients the building
• •The scrolls themselves, handwritten on parchment by a trained scribe over about a year, which are the most valuable object in any congregation and are dressed, crowned and treated with elaborate respect
• •The bimah, a raised platform from which the Torah is read, placed centrally in traditional arrangements and at the front in many modern ones, a difference that marks a real change in how the service is conceived
• •A perpetual lamp burning above the ark
• •Seating, with separate seating for men and women in Orthodox congregations, divided by a partition, and mixed seating in Conservative, Reform and other movements
• •No images of God and generally no representational sculpture, with decoration running to geometric work, plant motifs, Hebrew inscriptions and, in many historic and modern buildings, the signs of the zodiac and depictions of biblical scenes, which were more common than the prohibition suggests

Traditional sources describe the institution with three names, and the trio explains why it worked as a substitute for the temple. It is a house of prayer, holding services three times daily where a quorum exists. It is a house of study, which is the function that ranks highest in rabbinic thought, since study of Torah is itself an act of worship and a synagogue's library and study hall are as important as its sanctuary. And it is a house of assembly, the community's meeting place, court, school, hostel and charitable centre. Crucially, none of these requires a priest. The rabbi is a teacher and legal authority rather than an intermediary, cannot perform any ritual that a knowledgeable layperson could not, and is not necessary for a service to take place. What is necessary is a minyan, a quorum of ten adults, which makes the community rather than the officiant the essential ingredient.

The origins predate the temple's destruction, which is why the transition was possible at all. Synagogues are attested archaeologically from the third century BC in Egypt and in first-century Judaea, and the likeliest account is that they developed during or after the Babylonian exile, when a population without access to the temple needed somewhere to gather, read and pray. They therefore existed alongside the temple for centuries, handling local worship and study while sacrifice remained centralised. When the temple fell, the institution that survived was already functioning, and the rabbinic movement reorganised the religion around it, replacing sacrifice with prayer at the corresponding hours, transferring priestly purity concepts into domestic practice, and relocating authority from a hereditary priesthood to scholars whose standing rested on learning. The transformation took generations and produced the Mishnah and eventually the Talmud, which are the record of that reconstruction.

Because no form is prescribed, synagogue buildings have consistently adopted the architecture of wherever they were built, which makes them a visible record of Jewish presence and of its conditions. Ancient synagogues in Galilee use Roman basilica forms with mosaic floors. Medieval European examples borrow Gothic vaulting. The wooden synagogues of Poland and Lithuania, with elaborate painted interiors and tiered roofs, were a distinctive regional form and were almost entirely destroyed between 1939 and 1945. The nineteenth century produced a fashion for Moorish revival, with horseshoe arches and domes, which was a deliberate statement about eastern origins at a moment of emancipation and integration in central Europe. Where communities were restricted, buildings were required to be inconspicuous or lower than nearby churches, which is why several historic synagogues are set below street level or hidden behind ordinary facades. Modern architects including Louis Kahn and Frank Lloyd Wright have designed notable examples.

The synagogue existed before the temple fell and was able to replace it because it was already functioning as a local house of prayer, study and assembly, requiring a quorum of ten rather than a priest, an altar or a location. The constant features are an ark of Torah scrolls on the wall facing Jerusalem, a reading platform and a perpetual lamp, and everything else varies. The rabbi is a teacher rather than an intermediary, and because no architectural form is prescribed, synagogue buildings have consistently adopted the styles of wherever the community lived.