Rockcliffe Mansion

Marion County Courthouse is a historic courthouse located at Hannibal, Marion County, Missouri. It was built in 1901, and is a two-story, rectangular, Classical Revival style limestone building. It features an octagonal drum dome topped by an octagonal lantern towering above the two-story portico with four Corinthian order columns.: 5  It was added to the National Register of Historic Places in 2002.

Eighth and Center Streets Baptist Church is a historic African-American Baptist church located at 722 Center Street in Hannibal, Marion County, Missouri. It was built in 1872, and is a red brick, two-level rectangular Romanesque Revival building measuring approximately 70 feet long by 40 feet wide.: 2  It was listed on the National Register of Historic Places in 1980. It is located in the Central Park Historic District and Maple Avenue Historic District.

National Tom Sawyer Days also known as the National Tom Sawyer Days Carnival takes place in Hannibal, Missouri every year over the July 4 weekend. The festival includes contests from Mark Twain novels along with a parade, fireworks and a 10 km (6.2 mi) run.

Maple Avenue Historic District is a national historic district located at Hannibal, Marion County, Missouri. The district encompasses 148 contributing buildings in a predominantly residential section of Hannibal. It developed between about 1850 and 1950, and includes representative examples of Federal, Italianate, Late Victorian, Colonial Revival, and Bungalow / American Craftsman architecture. Located in the district are the separately listed Ebert-Dulany House, Rockcliffe Mansion, and Eighth and Center Streets Baptist Church. Other notable buildings include Central School by William B. Ittner, Pilgrim Congregational Church, McKnight House, Cliffside, Hogg House, the McVeigh House, the Mclntyre House, the Settles House, and the Clayton House. It was listed on the National Register of Historic Places in 2002.

Central Park Historic District is a national historic district located at Hannibal, Marion County, Missouri. The district encompasses 261 contributing buildings, 1 contributing site, and 4 contributing structures in a predominantly residential section of Hannibal. It developed between about 1840 and 1939, and includes representative examples of Romanesque Revival, Late Victorian, and Art Deco architecture. Located in the district are the separately listed Federal Building, Hannibal Old Police Station and Jail, and Eighth and Center Streets Baptist Church. Other notable contributing resources include Central Park with a war memorial monument and a life-size bronze statue of William Henry Hatch (1833-1894), City Hall (1909), old Missouri Guaranty Building (1894), Price Apartments (1904), YMCA (1910), Masonic Temple (1882), Park Methodist Church (1881, 1906), Retards Row (1855), Elks Building (1925), Holmes Building (c. 1904), Security Building (1912), Kerchival-Iakenan-Lathrop House, Admiral Coontz Birthplace, Inmaculate Conception Chapel (1854), Episcopalian Trinity Church (1860), and William C. Henn House (1937). It was listed on the National Register of Historic Places in 1982.

The United States Post Office at Hannibal, Missouri, is a federal building previously used as a post office and as a courthouse. It is also known as the Federal Building or the Naval Reserve Center, and is located at 600 Broadway. The building's architect was Mifflin E. Bell, and it was completed in 1888. The building is an excellent example of a late Second Empire architectural style. The United States District Court for the Eastern District of Missouri met in this building until 1960, and the U.S. Circuit Court for that district met here until that court was abolished in 1912. It is now owned by the city.: 4  It was listed on the National Register of Historic Places in 1980 as "Federal Building". It is located in the Central Park Historic District.

Clemens Field is a baseball stadium located at 403 Warren Barrett Drive, at the south end of downtown Hannibal, Missouri, United States. The stadium was named for author Samuel Clemens (who wrote under the name Mark Twain), a Hannibal resident. Built in 1938 (to replace the first field that was destroyed by fire), Clemens Field has served as a home for numerous minor league baseball teams. The ballpark underwent extensive renovations in 2008, and was most recently the home of the Hannibal Hoots of the collegiate summer Prospect League. Clemens Field was listed on the National Register of Historic Places in 2008.

The Mennonite Mission Church (formerly Mennonite Gospel Mission) was a Mennonite church located in Hannibal, Missouri, part of the South Central Conference of the (old) Mennonite Church denomination.

Hannibal Lime Company Office is a historic commercial building located at Hannibal, Marion County, Missouri. It was built about 1880, and is a two-story red brick structure, three bays wide and six deep. It has a rubble foundation, tall segmental arched openings, and hipped roof with front gable.: 2  It was added to the National Register of Historic Places in 1984.

Hock Building, also known as Standard Printing Company, Warehouse No. 8, is a historic commercial building located at Hannibal in Marion County, Missouri. It was built in 1872, and is a three-story brick structure, three bays wide and eight deep. It features arched windows with thick cast-iron moldings above and iron pilasters at the first floor storefront.: 42–43  It was added to the National Register of Historic Places in 1986.

Hannibal Old Police Station and Jail, also known a City Hall, is a historic police station and jail located at Hannibal, Marion County, Missouri. It was built in 1878–1879, and is a two-story, eclectic late Victorian style brick building on a granite foundation. It features two octagonal towers of different heights and a complex roof defined by a heavy bracketed cornice.: 2  It was added to the National Register of Historic Places in 1979. It is located in the Central Park Historic District.

Benjamin Horr House, also known as the Standard Printing Company, is a historic home located at Hannibal, Marion County, Missouri. It was built about 1855, and is a two-story, vernacular Greek Revival style brick structure. It has a front gable roof with cornice. It is the earliest surviving building to have been used for education in Hannibal, having once housed a private school run by the family of one of Mark Twain's former schoolteachers.: 40–41  It was added to the National Register of Historic Places in 1986.