The Jewish Quarter of Trebic got its inscription mainly because it is one of the most important and well-preserved Jewish quarters in Europe. The inclusion of the St Procopius Basilica illustrates the coexistence of Christian and Jewish cultures over the centuries. I agree with the previous reviewers that the inscription is justified and also that there is not much to see from a simple tourist point of view. A visit of the basilica is worthwhile though, in particular because of the beautiful Romanesque vault in the crypt. The "guided tour" turned out to be a two-sided text-sheet and we could visit the basilica accompanied by a guide. However, the guide answered all our questions and we could take photos, although that's actually not allowed.
The (formerly) Jewish Quarter is located at the foot of the basilica, on the river bank opposite to the Christian town centre. Most houses have been renovated and are well preserved, as the buildings at the entrance of the quarter, the former town hall and the two synagogues. Others, like the poor-house, are still in bad condition. In particular the Rear Synagogue is worth a visit, the thick walls and pillars are striking. The interior is decorated with wall paintings from the 18th Century. A special feature is the women's gallery in the upper part, that could only be reached by a staircase in an adjacent building.
For me, the best part of the site was the Jewish cemetery (photo). On the way uphill to the cemetery you have a beautiful view of the basilica. The older, rear section of the burial ground is located on a steep slope. The gravestones stand close together in the grass and between ivy. The oldest part of the cemetery is from the late 15th Century, the oldest gravestone with a legible inscription dates back to 1625. Beware that the cemetery is closed during the Sabbath (from Friday to Saturday evening).