State officers first used the state capitol in 1869, moving from Constitution Hall, what is now 427-429 S. Kansas Avenue. Besides being used as the Kansas statehouse from 1863 to 1869, Constitution Hall is the site where antislavery settlers convened in 1855 to write the first of four state constitutions, making it the "Free State Capitol". The National Park Service recognizes Constitution Hall in Topeka as headquarters in the operation of the Lane Trail to Freedom on the Underground Railroad, the chief slave escape passage and free-trade road.