A welcome sign is seen before the second official Republican debate of the 2016 U.S. presidential campaign at the Ronald Reagan Presidential Library in Simi Valley, California, Sept. 16, 2015. Reuters

For decades, GOP candidates have hailed Ronald Reagan as the best Republican leader the nation has known. This week, they got the chance to fight for the White House from a place dedicated to his work.

CNN hosted the second debate of the 2016 presidential campaign Wednesday night at the Ronald Reagan Presidential Library and Center for Public Affairs, which includes a permanent exhibit on the two-term president. The Simi Valley event featured 16 candidates in two separate debates expected to draw an audience of tens of millions.

Ronald Reagan's sons Ron and Michael Reagan recently told reporters they were closely watching the GOP race, especially front-runner Donald Trump. "I think he'd be kind of appalled. I hope that if he's floating around somewhere, he's amused, being separated from all this," Ron Reagan, 57, a liberal political commentator, told Politico magazine.

He said his father shouldn't be compared to Trump. "I can't think of two people who are more diametrically opposed. This egotistical, narcissistic guy with the weird comb-over swanning in his private plane," said Ron Reagan.

Below are five facts about the Reagan library:

1. The library has more than 60 million pages of documents, more than 1.6 million photographs, a half million feet of motion picture film, tens of thousands of audio and video tapes and more than 40,000 artifacts.

2. The museum has a full-size replica of the White House's Oval Office. It's said that Reagan never took off his suit jacket while in the presidential office.

3. At the museum store, you can buy presidential jelly beans and a Reagan sculpture with bronze patina finish.

4. The museum features the Air Force One that flew Reagan in over 660,000 miles to 26 countries and 46 U.S. states.

5. It's one of the nation's busiest presidential libraries, with 500,000 visitors a year.