The Dormer-Canfield Atlantic Hotel was built in 1866 by Martin Dormer & Thomas Canfield. Dormer owned a distillery and garden popular on the hill above & Canfield was a canal boatman by trade. They ran a rowdy saloon and hotel unlike others in St. Clair. It was known to contain "Brothel House". And history depicts the site to play a major role in Pinkerton Detective James McParland's infiltration of the Molly Maguire's though saloon keeper Patrick Dormer a known chief of the Ancient Order of Hibernians and brother to hotel owner Martin Dormer.
The building also houses a cobblestone tunnel that begins in the basement of the building. It is approximately 8 feet wide by 7 feet tall. It is known to, at one time, go to the distillery on the hill where the church now lies. As far as its use, it suggested it could have been used for the Molly Maguire's to escape from authorities, or to transport alcohol during prohibition from the distillery or possibly part of the Underground Railroad. During the construction and completion of the hotel between 1849 - 1856 six united states presidents served in office, including James Polk, Zachery Taylor, Millard Fillmore, Franklin Pierce, James Buchanan, and finally Abraham Lincoln.