The document discusses the history and facts about doors. It notes that the earliest doors date back to ancient Egypt and were depicted in tomb paintings. The largest doors in the world are found at NASA's Kennedy Space Center, standing over 450 feet tall. The document then profiles different door styles throughout history from old French doors to modern doors. It concludes with random door facts such as false doors in ancient Egypt representing doors to the afterlife and January being named for the Roman god of doors.