The Immaculate Conception Church is believed to be the oldest Catholic Church site between Dubuque, Iowa, and St. Paul, Minnesota. Inside the church, on the back wall, there is a framed port record on which lists all the Ticonderoga ship passengers who sailed from Liverpool, England to New Orleans in the winter of 1850. :This group of Irish immigrants constructed a small log church in 1851 under the direction of their pastor Father Thomas Hore. The current church building you see today was the third church at this location, completed in 1870.