This building was the capitol for only four days in 1855, but many believe that the actions of the legislature that met here led directly to the Civil War. Governor Andrew Reeder picked this location, away from the proslavery influence of Missouri, where the legislature would choose a permanent seat of government, create a constitution, and decide if Kansas would be a free or slave state. Instead the legislature kicked out the antislavery members and passed a bill to move the government to Shawnee Mission near the Missouri border. Inside this native stone building visitors will learn the stories of the antislavery and proslavery people of territorial Kansas, set alongside the beauty of the Kaw River Nature Trail.

The site offers exhibits, tours, and educational and recreational events.