The Ben Ezra Synagogue in Coptic Cairo is one of the oldest synagogues in Egypt, traditionally built on the site where the infant Moses was found in the bulrushes. The current structure dates from the 9th-12th centuries, though it stands on the foundations of a much earlier building. Its historical significance is enormous: in the late 19th century, a cache of over 300,000 manuscript fragments (the Cairo Geniza) was discovered in the synagogue's storeroom — documents spanning 1,000 years of Jewish life in the Mediterranean, now in libraries across the world.
The synagogue has been restored and is open to visitors within the Coptic Cairo compound. It functions as a museum rather than an active place of worship, but the restoration has been careful and the interior — with its carved wooden galleries and elaborate bimah — gives a clear sense of the original building. Photography is allowed.