Douglas, St. Clair County, Illinois

Smithton Township (Township 1 South, Range 8 West) is located in St. Clair County, Illinois. As of the 2010 census, its population was 4,275 and it contained 1,684 housing units.

Smithton is a village in St. Clair County, Illinois, United States. The population was 4,006 in the 2020 United States Census. It is part of the Metro East region of Greater Saint Louis.

WSDZ (1260 AM) is a radio station licensed to Belleville, Illinois, and serving the Greater St. Louis radio market. It is owned and operated by Relevant Radio, Inc. WSDZ carries a Catholic talk and teaching radio format supplied by the Relevant Radio network. WSDZ, along with 1120 KMOX, are responsible for activation of the St. Louis area Emergency Alert System.By day, WSDZ is powered at 20,000 watts. But at night, to avoid interfering with other stations on AM 1260, it reduces power to 5,000 watts. It uses a directional antenna at all times. The studios are located on Weber Hill Road in St. Louis. The transmitter is off Schuleter Germaine Road in Belleville. Programming is also heard on 99-watt FM translator 95.1 MHz K236CS in St. Louis.

The Turkey Hill Grange Hall is a historic Grange hall located at 1375 E. Illinois Route 15 in Belleville, Illinois. Built in 1937, the hall was the third used by the Turkey Hill Grange #1370, which was founded in 1874. As part of the National Grange, the Turkey Hill chapter served both as a political advocacy group for farmers' interests and a social group for isolated rural residents. While the 1937 hall follows the national organization's suggestions for Grange hall design, the chapter also hired local architecture firm Rubach & Weisenstein to create the building's Neoclassical design, an uncommon practice for a Grange hall. The hall is still in use by the Grange, which is the oldest Grange chapter in St. Clair County; the hall itself is one of the few historic Grange halls in Illinois still standing and in good condition.The hall was added to the National Register of Historic Places on December 27, 2016.

St. Clair County is the ninth most populous county in Illinois. Located directly east of St. Louis, the county is part of the Metro East region of the Greater St. Louis metropolitan area in southern Illinois. As of the 2020 United States census, St. Clair County had a population of 257,400, making it the third most populous county in Illinois outside the Chicago metropolitan area. Belleville is the county’s seat and largest city.Cahokia Village was founded in 1697 by French settlers and served as a Jesuit mission to convert tribes of the Illinois Confederation to Christianity. Prior to the establishment of Illinois as a state, the government of the Northwest Territory created St. Clair County in 1790 out of the western half of Knox County. In 1809, the county became the administrative center of the Illinois Territory and one of the two original counties of Illinois, alongside Randolph County. In 1970, the United States Census Bureau placed the mean center of U.S. population in St. Clair County.

Freeburg is a village in St. Clair County, Illinois, United States. Located within Greater St. Louis, it is a southeastern exurb with many residents commuting to Downtown St. Louis or the Belleville area for employment. As of 2010, Freeburg had a population of 4,354.

Prairie du Long Township is located in St. Clair County, Illinois. As of the 2010 census, its population was 2,244 and it contained 864 housing units.

The Cathedral of Saint Peter is the mother church of the Roman Catholic Diocese of Belleville, located in Belleville, Illinois. The cathedral parish of Saint Peter was founded in 1842 at a location east of the present structure, and named after Saint Barnabas the Apostle; it was rededicated to Saint Peter in 1847. By 1863, the congregation recognized the need for a larger structure. It constructed a brick church on the cathedral's present site which it dedicated in 1866.In 1887, Pope Leo XIII created the Diocese of Belleville from the southern portion of the Diocese of Alton (now the Diocese of Springfield) and named Reverend John Janssen as the first bishop. Janssen chose St. Peter's as his cathedral. On January 4, 1912, around 6 p.m., neighborhood children noticed a fire in the upper portion of the building. Although they arrived quickly, firefighters were hampered in their efforts to extinguish the blaze by a lack of water pressure to reach the 80 ft (24 m) roof and the bitter 15 °F (−9 °C) temperatures. Water company officials blamed the poor water pressure on a broken valve at the water station. Soon, the fire burned through the roof timbers, which fell and ignited other parts of the structure. When the fire was extinguished, all that remained were the exterior walls and bell tower. One local newspaper estimated the damage at US$100,000 and said that insurance would cover only $40,000 of the repairs.The present structure's Gothic architecture was modeled after that of the Cathedral of Exeter, England. It was designed by the architect Victor Klutho. The brick walls were covered with Winona split-face dolomitic limestone accented with Indiana limestone in 1956. The sanctuary was renovated in 1968, to conform to directives of the Second Vatican Council, and the south end of the cathedral expanded to increase capacity to 1,270. A mass in January 2012, marked the centennial of the fire and rebuilding, and also reinstallation of the pulpit and cathedra canopy which were removed during the 1968 work.The cathedral houses a three-manual, 40-rank organ by the M. P. Moller Company that dates from 1968. A second console has been added along with four ranks of pipes.

Paderborn is a census-designated place in St. Clair County, Illinois, United States. Its population was 43 as of the 2010 census.

Floraville is a census-designated place in St. Clair County, Illinois, United States. Its population was 53 as of the 2010 census.

Hotel Belleville is a historic hotel building at 16 S. Illinois Street in Belleville, Illinois. The hotel was built in 1930–31 to replace the city's previous hotel, the Belleville House; like its predecessor, the hotel marketed itself as the most luxurious and modern hotel in Belleville. Architects Manske & Bartling designed the building in the Art Deco style; their design included first-floor window bays with terra cotta blocks, brick pilasters above the entrance, ornamental brickwork on the upper floors, and a parapet. The hotel's amenities included a restaurant and cocktail lounge, banquet and event space, office space for community organizations, and storefronts for local businesses. In the decades after it opened, the building served both as a center of Belleville's social life and a home for regional conventions. The hotel operated until 1961, when it was converted to an assisted living facility for the elderly.The building was added to the National Register of Historic Places on June 20, 2018.

The St. Clair County Courthouse is a government building in Belleville, the county seat of St. Clair County, Illinois, United States. Built in 1976, it is the fifth courthouse in the history of the county, and one of two that still stands.