The enormous bronze doors of St. John Lateran in the Vatican are more than 2000 years old—and are still in use today. They were constructed around 80 BCE as part of the Curia Julia, where the Senate sat, in the Roman Forum. Julius Caesar would have walked through these grand doors each time he came to address the Senate.
In 1660, Pope Alexander II had the doors moved from their original position to the Archbasilica of St. John Lateran, the oldest papal basilica in Rome, where tour groups now walk where emperors stepped.