Elijah P. Lovejoy Monument

Alton National Cemetery is a United States National Cemetery located in the city of Alton, in Madison County, Illinois. Administered by the United States Department of Veterans Affairs, it encompasses only half an acre plot of land, and as of the end of 2005, had 522 interments. It is maintained by the Jefferson Barracks National Cemetery, in St. Louis, Missouri.

The Yakel House and Union Brewery are a historic house and brewery complex located at 1421-1431 Pearl St. in Alton, Illinois. Philip Yakel, a German immigrant, built the brewery soon after coming to America in 1836. The brewery was the first in Alton and one of the city's earliest successful industries. Yakel's son George, who eventually ran the brewery alongside his father, built the house in 1863; it was the family's second home at the site. The brick home features a vernacular design influenced by German architectural tradition. William Netzhammer, a brewer from St. Louis, purchased the brewery in 1882. The Netzhammer family ran the brewery until it closed in 1952;, notably, the brewery continued production during Prohibition by making near beer.The complex was added to the National Register of Historic Places on May 11, 1982.

The Middletown Historic District is a historic district in Alton, Illinois. The primarily residential district includes portions of Alton's Middletown and Hunterstown neighborhoods and comprises 653 buildings, 613 of which are contributing buildings. Settlement in the district dates to the original plat of Alton in 1817, which included the southern half of Middletown. Development in the district continued through the 19th century and into the 20th, spanning all of Alton's early history. The district also represents multiple eras of Alton's architectural history. Most early houses in the district were designed in the Federal style, while the Italianate and Queen Anne styles were predominant in the latter half of the 19th century.The district was added to the National Register of Historic Places on July 11, 1978. in 1982, the boundaries of the district were expanded to include Alton's Pagan Hill neighborhood. In January 2022, the boundaries were expanded again and now take in most of downtown Alton. The expanded area includes 134 new properties covering 11 blocks in the downtown area stretching from State Street to Ridge Street along Third Street, Broadway, and Front Street/Landmarks Boulevard.

Alton ( AWL-tən) is a city on the Mississippi River in Madison County, Illinois, United States, about 18 miles (29 km) north of St. Louis, Missouri. The population was 25,676 at the 2020 census. It is a part of the River Bend area in the Metro-East region of the Greater St. Louis metropolitan area. It is famous for its limestone bluffs along the river north of the city, as the former location of the state penitentiary, and for its role preceding and during the American Civil War. It was the site of the last Abraham Lincoln and Stephen Douglas debate in October 1858. The former state penitentiary in Alton was used during the Civil War to hold up to 12,000 Confederate prisoners of war.

Lyman Trumbull House is a house significant for its association with former U.S. Senator from Illinois Lyman Trumbull. The house is located in the historic Middletown neighborhood in Alton, Illinois. Senator Trumbull was best known for being a co-author of the Thirteenth Amendment to the United States Constitution. The house was built around 1849, and was declared a National Historic Landmark in 1975. Senator Trumbull lived in this house from 1849 to 1863, according to the documentation provided in the National Historic Landmark application. The house is a 1+1⁄2-story red brick, gable-roofed residence with limestone foundation. It was originally rectangular-shaped, but late in the 19th century an addition was built on the rear of the house, transforming it into an "L" shaped residence. There are three gabled dormers protruding from the front roof, one on the rear of the original house, and one on the northern elevation of the roof on the addition. Adorning the front of the house is a centrally-located one-bay entrance porch supported by two fluted pilasters, all made of wood. Turned balusters flank the porch and the several wooden steps that lead to a brick walkway surrounding the dwelling. An entrance to the basement is located underneath the porch. The chief front entrance to the Trumbull House is a single door with side lights and semi-elliptical fanlight. On the south side of the house is a second basement entrance, and it is sheltered by a pedimented portico supported by two Doric columns.

The Haskell Playhouse is a children's playhouse located in Haskell Park in Alton, Illinois. Dr. William Abraham Haskell, a physician and one of the wealthiest residents of Alton, commissioned the playhouse as a present for his daughter Lucy's fifth birthday in 1885. Architect Lucas Pfeiffenberger designed the playhouse in the Queen Anne style. The house's design features a raised front porch with a projecting entrance, diagonal stickwork on the porch and first floor, and fishscale shingles on the second-story gable ends. An ornamental iron fence with a small spire tops the house's hipped roof. Lucy Haskell died of diphtheria four years after her playhouse was built, and by 1916 her mother Florence (Hayner) Haskell was the only surviving Haskell still living in Alton. Florence demolished the family's home that year but kept the playhouse as a memorial to her daughter; she donated the land to the city to serve as a memorial park.The playhouse was added to the National Register of Historic Places on July 30, 1974.

Lock and Dam No. 26 was a lock and dam located near Alton, Illinois on the Upper Mississippi River around river mile 202.5. Opened in 1938, its largest lock was 600 feet long. It was demolished in 1990 and replaced by the Melvin Price Locks and Dam, which is also known as Lock and Dam number 26.

Marquette Catholic High School is a private, Catholic high school in Alton, Illinois. It is located in the Diocese of Springfield in Illinois.

Alton Township is located in Madison County, Illinois, in the United States. As of the 2010 census, its population was 27,865 and it contained 13,266 housing units.

The Hotel Stratford is a historic hotel located at 229 Market St. in Alton, Illinois. The hotel, originally known as the Illini Hotel, opened in 1909. St. Louis architectural firm Barnett, Haynes & Barnett designed the hotel in the Classical Revival style. The five-story brick building features brick quoins, limestone bands and window sills, terra cotta ornamentation, and a cantilevered cornice. The hotel opened a rooftop garden in 1910 and a reception room in 1912, and it became one of many hotels which drew conventions to Alton; a contemporary newspaper account described the building as part of the "greatest improvement in property in the city of Alton". In 1925, new owner E. J. Lockyer renamed the hotel to its current name. The hotel is the only hotel built in Alton before 1950 that is still in operation.The hotel was added to the National Register of Historic Places on January 27, 2000.

The Alton Bridge was a railroad bridge that carried the Chicago, Burlington, and Quincy (later Burlington Northern) across the Mississippi River between West Alton, Missouri, and Alton, Illinois. It was located 100 yards (91 m) upriver from, and parallel to, the Old Clark Bridge. The bridge was built between 1892 and 1894 and was removed shortly after the line was abandoned in 1988. With a total length of 2,060 feet (630 m), it consisted of eight through-truss segments—six Pratt trusses, one Pennsylvania truss, and one pivot-swinging truss.

The Guertler House is a historic house located at 101 Blair St. in Alton, Illinois. Stonemason Ignaz Bruch built the house in 1854. Bruch, who immigrated to the United States from Germany in 1846, was a prominent Illinois stonemason who constructed buildings in cities ranging from Chicago to St. Louis, Missouri. The Guertler House is a Federal building with three bays. The front door and windows have a pointed arch design, while the second story of the house's west side has a single Gothic arch window.The house was added to the National Register of Historic Places on July 30, 1974.