|Address:||110 South Main Street|
|Year Built:||c. 1829, altered c. 1900s, c. 1960s|
|Original Owner:||Senator Jesse B. Thomas|
Constructed around 1829, likely for Jesse B. Thomas, a retired United States Senator for the State of Illinois and a locally prominent businessman, the Adam Pyle Building is the oldest commercial structure in the Downtown Mount Vernon Historic District. Prior to retiring to Mount Vernon in 1829, Jesse B. Thomas held the distinction of being a delegate to the 10th Congress from the Indiana Territory, and later as one of the first two Senators to represent the State of Illinois. He was born in Shepherdstown, Virginia (now West Virginia), in 1777, and went on to study law in Mason County, Kentucky, where he served as the county clerk until 1803, when he moved to Lawrenceburg in the Indiana Territory to practice law. In 1809, the same year he moved to Illinois, he was elected to Congress, serving in that position until 1818. From 1818 to 1829, he served the same State as Senator. During this time, he was Thomas who proposed the Missouri Compromise. After refusing to serve the third term, Thomas moved to Mount Vernon in 1829 and went into the mercantile trade, foregoing both his law and political careers. On May 2, 1853, Thomas ended his life in suicide, and is interred in Mount View Cemetery. The building was later renamed for Mr. Adam Pyle, who used the building to house his tailor shop.
The Adam Pyle Building retains most of its original architectural design and mid- to late-19th century alterations. It has a distinct brick cornice arranged in a horizontal saw-tooth pattern. All four upper-level windows have pressed-metal hoodmolds that were added sometime around the turn of the century, perhaps to blend this structure with the many larger Italianate buildings that were constructed during that period.