Where are Saint Peter and Paul buried?

Saint Peter and Paul were both killed at the time of the Christian persecutions in Rome, which were initiated by Nero to steer blame on a fire that devastated Rome from him to Christians. Peter was crucified upside down because he felt that he was not worthy of dying in the same manner that Christ did, and Paul was beheaded (despite not being able to escape death for preaching, Paul had a better form of death because he was a Roman citizen). Saint Peter was buried in a tomb that was covered later by Christians by Saint Peter's basilica, and Saint Paul was buried under the Basilica of Saint Paul. Both Basilicas were built in the reign of Constantine, the first Christian Emperor of Rome.

Basilica of Saint Paul

Saint Peter's Basilica