There has been a Jewish population in Pilsen since the 1300s, and at one point there were five synagogues in the city. 

This is one of the two remaining and is massive, ranking as the second-largest in Europe and third in the world after Jerusalem and Budapest. 

Nowadays it’s more of a poignant reminder of a population that was ripped away from its home in the 20th century, but the interior has a decorative Moorish-style design well-worth seeing.