Completed in 1913, the Jefferson Memorial building was built near the main entrance to the Exposition, at Lindell and DeBalivere. It was built with proceeds from the fair, to commemorate Thomas Jefferson, who initiated the Louisiana Purchase, as was the first memorial to the third President. It became the headquarters of the Missouri History Museum, and stored the Exposition's records and archives when the Louisiana Purchase Exposition company completed its mission. The building is now home to the Missouri History Museum, and the museum was significantly expanded in 2002–3.