Plymouth Synagogue on Catherine Street dates from 1762 and is a Grade II* listed building — one of the oldest Ashkenazi synagogues in the world still in use for worship. The building is a simple, dignified Georgian structure with a plain exterior that gives little away from the street.
The interior has its original Georgian fittings: box pews, a central bimah (reading platform), and the ark at the eastern end. The synagogue is not normally open for casual visitors, but the Plymouth Hebrew Congregation occasionally runs tours and it can be visited by appointment. Worth pursuing if you have any interest in the history of Jewish communities in England — the congregation's survival through the 20th century and its long connection to the Royal Navy dockyards are a telling part of the city's story.