The Lincoln-Herndon Law Offices are within the only remaining building in which Abraham Lincoln maintained a law office. The site consists of the surviving portion of a three-story brick commercial block constructed in 1840-41. Exterior details reflect the then-popular Greek Revival architectural style. Though designed as a commercial structure, portions of the building were rented for offices and other purposes. Lincoln practiced law in the building from 1843 to about 1852. During his 1847-1849 tenure as a United States Congressman, partner William H. Herndon (1818-1891) maintained the practice. In 1978 the building was listed on the National Register of Historic Places as a part of the Central Springfield Historic District.
The “restored” building’s first floor visitor center consists of an exhibit gallery and audiovisual theater, along with a room interpreted as an 1840s post office facility. On the second floor are rooms representing those used by the federal court, and on the third floor a "common room" and three lawyers’ offices. Two of the offices were used by Lincoln and his partners, prominent local attorneys Herndon and Stephen T. Logan (1800-1880). The recreated offices are notable for the plainness and disorder that were remembered by Lincoln associates.