Where is st bartholomew buried?

There is no historical figure named "St. Bartholomew." The name you might be thinking of is Saint Bartholomew, one of the twelve apostles of Jesus.

Saint Bartholomew is traditionally believed to be buried in the Basilica of St. Bartholomew on the Tiber Island in Rome. However, there is no archaeological evidence to support this claim.

It's important to differentiate between historical figures and saints, as the latter often have less concrete historical documentation due to their status as religious figures.