The White House has plenty of history, and plenty of former residents. Some are said to still be there, despite having died long ago.
After moving into the White House in 1945, Harry Truman wrote to his wife Bess about their spooky new abode: “I sit here in this old house … all the while listening to the ghosts walk up and down the hallway and even right in here in the study. The floors pop and the drapes move back and forth—I can just imagine old Andy [Jackson] and Teddy [Roosevelt] having an argument over Franklin [Roosevelt].”
Some White House ghosts stand head and shoulders above others. Read the reports of the most common specters haunting the president's home at mental_floss. Link