Pope Francis will be the third pontiff to visit the White House on Wednesday, Sept. 23.

Since the last papal visit in 2008 of Pope Emeritus Benedict XVI in 2008, Pope Francis will make a stop at the White House this Wednesday for the first part of his North American tour.

President Barack Obama will be making the unprecedented move of welcoming Pope Francis in person at Andrews Air Force Base in Washington, D.C. Currently, Pope Francis is in Cuba and has met former Cuban President Fidel Castro over the weekend.

So how does President Obama prepare for a visit from the Pope? By learning from former President George W. Bush.

In April 2008, President Bush welcomed Pope Benedict XVI to the White House. According to Yahoo, Bush pulled out all the stops during the visit. During that time it was Benedict's birthday, so the president, along with then-First Lady Laura Bush, surprised him with a rendition of "Happy Birthday" along with a birthday cake.

First Lady Bush ordered to have the Rose Garden surrounded by flowers that were white and yellow, the colors of the Vatican flag.

There was one faux pas that Bush made in 2007. When Bush went to the Vatican during that year, he called Benedict XVI "sir" instead of "Your Holiness." The State Department of Protocol will remind Obama not to commit the same mistake Bush made.

When greeting the Pope, you shake hands with him; or if you are Catholic, you can kiss the Pope's ring, which is located on the right hand.

When Pope Francis arrives at the White House, Obama and First Lady Michelle Obama will welcome him on the South Lawn. A crowd of 15,000 people are expected, hopefully to get a glimpse of the Pope. After his arrival, a 21-gun salute followed by a band playing the anthems of the Vatican and the United States.

The two will then head into the Oval Office for a private meeting.

Pope Francis will be the third Pope to visit the White House. In 1979, President Jimmy Carter welcomed Pope John Paul II, marking the first visit to the White House by a reigning Pope.