The door to the far right of the main entrance of St. Peter's Basilica is called the Porta Santa or Holy Door. This door is not only locked but it is also walled up and is only opened during Holy Years, also known as Jubilee Years. The Holy Years originally occurred every 100 years and later were changed to every 25 years. The Holy Door is also occasionally opened on other proclaimed special occasions. For more information on the Holy Door and for details of how this door is opened, click here.
In 2007, I was at the Basilica late in the afternoon after the crowds left and was able to take a couple of photos of the Holy Door without the usual crowds.
The walled up Holy Door from the inside:
In 2000, during the Jubiliee Year, I was very fortunate, honored, and excited to walk through the Holy Door while it was open. It was very crowded. This was the best photo I could get with my cheap film camera before I was ushered through the door.
Click continue to see close up views of the panels of the door. These panels are from a cropped photo I took of the door.
Here are the panels side by side so you can see the order of them: