The Little Church at Keystone is listed in the National Register of Historic Places.

Built in a pioneer town that was too small for two churches, the Catholic/Protestant Little Church is a monument to religious harmony and cooperation. Eleven teenage girls helped raise the money to construct the church under the sponsorship of Georgia Paxton, wife of prominent rancher and businessman William A. Paxton.

Mrs. Paxton formed a chapter of the King’s Daughters, a service organization. The girls raised money for the church project by holding bake sales, suppers and bazaars, and asking their neighbors for donations. The girls raised 60% of the project’s total cost of $1,200, and Mrs. Paxton contributed the remaining 40%.

Completed in 1908, the Little Church has a Catholic altar at one end, and Protestant altar at the other. Special pews with reversible backs allowed 75 churchgoers to face either altar, depending on the service. Pope Leo XIII granted a dispensation for the dual faith church.