Basilica of St. Mary of the Assumption (Marietta, Ohio)

The Castle is a historic Gothic Revival style home in Marietta, Ohio, USA.Since 1994 it has been operated as museum.

The Marietta Historic District is a historic district in Marietta, Ohio, United States that is listed on the National Register of Historic Places. Among the buildings in the district are ones dating back to 1788, the year in which Marietta was founded as the first white settlement in what is now Ohio. Among its most significant buildings are the Rufus Putnam House and the Ohio Company Land Office, which are also separately listed on the Register.When the district was added to the Register in 1974, it encompassed an area roughly bounded by the Muskingum and Ohio Rivers and Warren, Third, Fifth, and Sixth Streets. In 2001, some of its original boundaries were slightly reduced, but it was also expanded greatly to include an area roughly bounded by Marion, Montgomery, Ohio, Greene, Butler, and Second through Ninth Streets, and the Ohio and Muskingum Rivers. The resulting district encompasses over 900 acres (360 ha) and includes over two thousand contributing properties.The National Register includes properties and districts that are considered historic under any of four criteria: Association with significant events in American history Association with significant historical individuals Well-preserved and historically significant architecture Possibility of yielding archaeological evidenceWhile most properties and districts on the Register qualify under one or two of the criteria, the Marietta Historic District qualifies under all four.

The Washington County Courthouse is located at 205 Putnam Street in Marietta, Ohio. The courthouse is constructed of rusticated stone blocks for the foundation with smooth blocks rising to the roofline. The courthouse is the third for the county. The courthouse was designed and constructed by Samuel Hannaford & Sons, the same architects on the Monroe County Courthouse. The courthouse is included in the Marietta Historic District, which was added to the National Register on December 19, 1974.

Mound Cemetery in Marietta, Ohio, is a historic cemetery developed around the base of a prehistoric Adena burial mound known as the Great Mound or Conus. The city founders preserved the Great Mound from destruction by establishing the city cemetery around it in 1801. The city of Marietta was developed in 1788 by pioneers from Massachusetts, soon after the American Revolutionary War and organization of the Northwest Territory. Many of the founders were officers of the Revolutionary War who had received federal land grants for military services. Among high-ranking officers buried at the cemetery are generals Rufus Putnam and Benjamin Tupper, who were founders of the Ohio Company of Associates; as well as Commodore Abraham Whipple and Colonel William Stacy. The cemetery has the highest number of burials of American Revolutionary War officers in the country.

The Rufus Putnam House, also known as Campus Martius or Campus Martius Museum State Memorial, is a historic building in Marietta, Ohio. It was built as part of the Campus Martius fortification by General Rufus Putnam, during the early settlement of Ohio by the Ohio Company of Associates.The building is listed in the National Register of Historic Places individually, and it is also a contributing property of the Marietta Historic District. The building is the only surviving part of the Campus Martius fortification and has been enclosed inside the Campus Martius Museum building.The house has been called "the most outstanding architectural combination of New England tradition and frontier necessity preserved in Ohio today."

Campus Martius was a defensive fortification at the Marietta, Ohio settlement, and was home to Rufus Putnam, Benjamin Tupper, Arthur St. Clair, and other pioneers from the Ohio Company of Associates during the Northwest Indian War. Major Anselm Tupper was commander of the Campus Martius during the war. Construction began in 1788 and was fully completed in 1791. The Campus Martius was located on the east side of the Muskingum River, and upriver from its confluence with the Ohio River. A firsthand description of the fort is provided in Hildreth's Pioneer History, Campus Martius is the handsomest pile of buildings on this side of the Alleghany mountains, and in a few days will be the strongest fortification in the territory of the United States. It stands on the margin of the elevated plain on which are the remains of the ancient works [mounds], mentioned in my letter of May last, thirty feet above the high bank of the Muskingum, twenty-nine perches distant from the river, and two hundred and seventy-six from the Ohio. It consists of a regular square, having a block house at each angle, eighteen feet square on the ground, and two stories high; the upper story on the outside or face, jutting over the lower one, eighteen inches. These block houses serve as bastions to a regular fortification of four sides. The curtains are composed of dwelling houses two stories high, eighteen feet wide, and of different lengths. The Campus Martius site is now occupied by the Campus Martius Museum. The Rufus Putnam House, part of the original Campus, is enclosed in the museum. Campus Martius was located around 39°25′17″N 81°27′40″W.

The Campus Martius Museum interprets Ohio history. Campus Martius was the second fortification in Marietta, Ohio and the first primarily for civilian defense. The Rufus Putnam House, incorporated in the Museum, is the only remaining part of the fortification. The museum also includes the Ohio Company Land Office. Both are National Register of Historic Places properties. The museum is located a block from the Ohio River Museum.

The First Unitarian Church of Marietta is a historic Unitarian Universalist church in the city of Marietta, Ohio, United States. Founded in 1869, it uses a building constructed in 1858 for one of its two predecessor churches; this building's high-quality architecture has led to its designation as a historic site. In January 1830, Nahum Ward published an advertisement in the Marietta Intelligencer seeking to find other friends of liberal religion, and the resulting group organized as a Unitarian church in the following month.: 395  Members laid the cornerstone of their building in July 1855, and by the time of the building's dedication in June 1857, the congregation had paid approximately $25,000 for lot, materials, furnishings, and labor. The original form of the congregation ceased to exist in May 1869 at its merger with the city's Universalist church, which itself had been founded in 1817 but suffered severe damage to its property in an 1860 flood. The combined church took the name of "First Universalist Church of Marietta".: 396 Built of brick on a stone foundation and featuring additional elements of stone, the First Unitarian Church is a Gothic Revival building. Pilasters divide the facade into three bay, with the doorway in the center, and the side is divided into five. The left bay of the facade, from the perspective of a viewer on the street, is occupied by the base of a square tower nearly twice the height of the rest of the building; while shorter windows in the tower and facade sit below similar second-story windows, and the side windows occupy the height of both stories, tall third-story windows are set near the top of the tower, and the pilasters on all four corners of the tower, similar to those on the rest of the building, are crowned with pointed pinnacles. The building's general shape is that of a front-gable rectangle, with small-size crenellations atop the edges, and the Gothic Revival style is typified by the ogive windows and doorways in the facade and side. Constructed under the direction of architect John M. Slocomb, the building is one of the region's earliest extant Gothic Revival churches. Both stonework and brickwork were completed by local craftsmen, the bricks being made from clay extracted from Sacra Via, the ceremonial walls built by the Mound Builders near the edge of the Muskingum River.In October 1973, the church was listed on the National Register of Historic Places, qualifying both because of its architecture and its close connection to Nahum Ward, who was deemed a significant resident of nineteenth-century Marietta. It was the last of four Marietta locations to be listed on the Register in 1973, following the Mound Cemetery Mound in February and the Wilcox-Mills House and Erwin Hall at Marietta College in April. It is also a part of the Marietta Historic District, listed on the Register in 1974, which embraces more than two thousand buildings across 900 acres (360 ha) of the city.

The Ohio Company Land Office is one of the original buildings of the city of Marietta, Ohio, United States. The Office is listed individually in the National Register of Historic Places and as a contributing property to the Marietta Historic District. The Land Office was built after Ohio Company of Associates landed at Marietta in 1788. The Office was built at approximately 39°25′16.75″N 81°27′47.25″W. In 1791 the building was moved away from the Muskingum River so it could be protected by the guns of Campus Martius. From this location, Ohio Company surveyors plotted the company's entire purchase in southeastern Ohio, more than 900,000 acres (360,000 ha) in total, under the direction of Rufus Putnam as the company's chief. The building is a simple log structure with a gabled roof, pierced by a single chimney; one window is set into the side, and the front has space for just one window and the main entrance. Its location on a slope permits the slight exposure of the foundation on one side. Smaller elements include shutters for the windows and a pair of steps that provide access to the main entrance. As the oldest extant building anywhere in Ohio, the land office had become the focus of significant attention by the opening years of the twentieth century, with organizations such as Marietta's historical society devoting extensive effort to ensure its preservation.The building is now part of the Campus Martius Museum complex.

The Start Westward Memorial, officially known as the Memorial to the "Start Westward of the United States", also known as the National Start Westward Memorial of The United States or Start Westward Monument, is a 1938 sculpture designed by Gutzon Borglum and located in Muskingum Park in Marietta, Ohio, United States. Borglum agreed to take on the commission at the request of George White, his friend and former Governor of Ohio. It commemorates the westward expansion of the United States, and the sesquicentennial of the establishment of Marietta in 1788. It stands on purpose-designed esplanade designed by Borglum and the architect John Schooley. As the memorial has weathered badly, there are plans to recreate it in bronze, and move the original to a new indoor visitor center.

The Ohio River Museum is a museum that interprets the history of the Ohio River. The museum is situated on the Muskingum River, near its confluence with the Ohio River, in Marietta, Ohio. Opened on March 16, 1941, the museum celebrated its 75th anniversary in 2016.Among the museum's collection is the W.P. Snyder, Jr., the last steam-powered towboat on the river. The oldest remaining pilothouse is from the steamboat Tell City. The steamboat was built in 1889 and used to carry passengers and freight on the Ohio River. She was named after the city of Tell City, Indiana, on the banks of the Ohio River. She sank on April 6, 1917, in Little Hocking, Ohio. The pilothouse survived the sinking and is on display outside of the museum.The museum is located a block from the Campus Martius Museum. The Ohio River Museum is currently closed as a new museum will be constructed on the site. Partners in the new museum project include Ohio History Connection, Friends of the Museums dba Northwest Territory Museum Society, the Washington County Public Library and the Sons and Daughters of the Pioneer Rivermen.

Marietta is a city in, and the county seat of, Washington County, Ohio, United States. It is located in southeastern Ohio at the confluence of the Muskingum and Ohio Rivers, 11 miles (18 km) northeast of Parkersburg, West Virginia. As of the 2020 census, Marietta has a population of 13,385 people. It is the principal city of the Marietta micropolitan area, which includes all of Washington County, and is the second-largest city in the Parkersburg–Marietta–Vienna combined statistical area. Founded in 1788 by pioneers to the Ohio Country, Marietta was the first permanent U.S. settlement in the newly established Northwest Territory, created in 1787, and what would later become the state of Ohio. It is named for Marie Antoinette, then Queen of France, in honor of French aid in the American Revolution. The area was inhabited by various native tribes of the Hopewell tradition, who built the Marietta Earthworks, a complex more than 1,500 years old, whose Great Mound and other major monuments were preserved by the earliest settlers in parks such as Mound Cemetery. Since 1835 the city has been home to Marietta College, a private, nonsectarian liberal arts school with approximately 1,200 students. Leading up to the American Civil War, the city was a station on the Underground Railroad.