Chautauqua, Illinois

The Elsah Historic District is a 350-acre (140 ha) historic district in Elsah, Illinois. The district includes 48 contributing buildings which reflect the village's period of growth in the 1850s. Elsah was founded in 1853 as a riverfront town on the Mississippi River; by 1861, it had grown to its current size, as geographic and economic limitations prevented further expansion. The town's 1861 appearance is well-preserved, and three distinct areas of the town have gone almost entirely unchanged since. The historic commercial district on LaSalle Street, which extends three blocks inward from the river, consists mainly of stone buildings; all but one of its pre-1861 buildings, including all four of the village's historic taverns, still stand. The other two districts are both located on Mill Street and are primarily residential; the larger one is three blocks long and has an assortment of stone and brick houses, while the smaller section has a single block of Greek Revival homes. The district was added to the National Register of Historic Places on July 27, 1973.

Elsah is a village in Jersey County, Illinois. As of the 2020 census, the village had a total population of 519. Michael Pitchford is the village's current acting mayor. It is the home of Principia College. Elsah is a part of the Metro-East region and the St. Louis Metropolitan Statistical Area.

Principia College is a private liberal arts college in Elsah, Illinois. It was founded in 1912 by Mary Kimball Morgan with the purpose of "serving the Cause of Christian Science." "Although the College is not affiliated with the Christian Science Church, the practice of Christian Science is the cornerstone of campus life." Principia sits on bluffs overlooking the Mississippi River between Alton and Grafton in the Metro East region of Southern Illinois, thirty miles north of St. Louis. A portion of the school's 2,500-acre (1,000 ha) campus is a designated National Historic Landmark District, for its many buildings and design by architect Bernard Maybeck.

The Principia College Historic District is a National Historic Landmark District encompassing the central portion of the campus of Principia College in Elsah, Illinois. The campus master plan, as well as eleven of its buildings, are important late designs of architect Bernard Maybeck, best known for his influential architecture in the American West. The Principia was declared a National Historic Landmark in 1993, and was also placed on the National Register of Historic Places that same year.

The Principia Astronomical Observatory is an observatory located on the campus of Principia College, in Elsah, Illinois, United States. The observatory was installed on June 18, 1998. It features a 16 inch mirror and is of a Ritchey-Chretien design. The objective focal length of the telescope is 4000 mm. The control software is by the Telescope Control System written by Dave Harvey of Comsoft Software (of Tucson, AZ). The mirror was ground and certified by Don Loomis, former chief optician at Kitt Peak National Laboratories. The telescope was manufactured by Optomechanics Research. It is the largest academic telescope in the region.

The Charles Brainerd House is a historic house located at 420 E. Main St. in Grafton, Illinois. The house was built in 1885 for Charles Corrington Brainerd, the superintendent of the Grafton Stone and Transportation Company. Architect William Embley designed the house in the Queen Anne style. The house has an asymmetrical plan which includes an angled front entrance and a multi-component roof with several gables and a pyramid above the entrance. Three of the gable ends feature coved cornices and decorative shingles and wood pieces. The front porch is supported by turned posts and features quarter round brackets and a spindlework cornice on its roof. The house was added to the National Register of Historic Places on February 5, 1998.

The John and Amelia McClintock House is a historic building located at 321 E. Main Street in Grafton, Illinois. Boat builder John McClintock built the house for his family circa 1910. The rock-faced concrete house, an unusual departure from Grafton's limestone buildings, has a Queen Anne design. The entrance is located at the corner of a wraparound front porch and is topped by a conical roof. The front of the house has a cutaway bay, giving the house an asymmetrical appearance, and the gable roof has multiple components; both features are typical of Queen Anne designs. The building is now used as a commercial property. The house was added to the National Register of Historic Places on February 16, 1994.

The Grafton Historic District is a 6-acre (2.4 ha) historic district in Grafton, Illinois. The district includes two blocks of Main Street (Illinois Route 100) and a section of Maple Street connecting to Grafton's historic wharf on the Mississippi River. The section of Main Street is a mostly residential portion of the city's primary residential, commercial, and social corridor. The houses in the district were built from 1836 to 1925 and have a variety of designs. Formal styles represented in the district include Queen Anne and Italianate; vernacular plans such as hall and parlor and side hall are also present. The Grafton Ice House is the lone commercial building in the district; built circa 1840, it is the only surviving building from Grafton's ice industry, which sold and stored frozen water from the river. The limestone wharf was built in 1846 to serve river transport, trade, and entertainment in Grafton; it was the city's second wharf, replacing an earthen wharf that was lost to a flood. The district was added to the National Register of Historic Places on February 16, 1994.

The Grafton Bank is a historic bank building located at 225 E. Main St. in Grafton, Illinois. The Classical Revival building was constructed in 1913. The buff brick building features extensive terra cotta ornamentation on its front facade. A Diocletian window and terra cotta transom bar top the entrance, and terra cotta pilasters stand on either side. A classical entablature tops the entrance; the entablature includes an architrave, a frieze inscribed with the bank's name, and a dentillated three-section cornice. A brick parapet wall tops the facade; a stepped parapet recedes from the wall along the sides of the building. The bank which originally occupied the building closed in the 1930s, and the building has since been used for a variety of other, mainly commercial, purposes. The building was added to the National Register of Historic Places on February 16, 1994. The building was featured on The Profit, a CNBC program.

The Ruebel Hotel is a historic hotel located at 207–215 E. Main St. in Grafton, Illinois. Built in 1913, the structure is the second hotel building on the site; the original Ruebel Hotel was built in 1879 and burned down in 1912. The Commercial style building features decorative brickwork typical of the style; the building's cornice has brick corbelling, and raised brick panels decorate the space above the second-story brick arched windows. The hotel, which also included a saloon and a restaurant, gained a reputation as one of the best in Jersey County. It is the only surviving hotel in Grafton. The hotel was added to the National Register of Historic Places on February 16, 1994.

The Slaten-LaMarsh House is a historic house located at 25 E. Main St. in Grafton, Illinois. The house was built circa 1840 for D.C. Slaten, the first mayor of Grafton. The house has a side hall plan, a design featuring a hall on one side and rooms connected by the hall on the other. It is a rare 1+1⁄2-story side-hall plan house, as other houses using the plan in Grafton are all two stories. Locally quarried limestone was used to build the house; at the time of its construction, Grafton limestone was only used to build structures within the city, though it later became a widespread building material in the region. The limestone blocks on the front facade are visibly more ashlar than those on the sides, a masonry choice which gives the front corners a quoin-like appearance. The house was added to the National Register of Historic Places on February 16, 1994.

St. Charles County Smartt Airport, also known as Smartt Field, is a county-owned, public-use airport in St. Charles County, Missouri, United States. It is located nine nautical miles (17 km) northeast of the central business district of the City of St. Charles. This facility is included in the National Plan of Integrated Airport Systems, which categorized it as a general aviation reliever airport. Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned SET by the FAA but has no designation from the IATA.