The Allegheny County Courthouse in downtown Pittsburgh, Pennsylvania, is part of a complex designed by H. H. Richardson. The buildings are considered among the finest examples of the Romanesque Revival style for which Richardson is well known.
The David Bradford House is a historic house museum at 175 South Main Street in Washington, Pennsylvania. Completed in 1788, it was the home of David Bradford, a leader of the Whiskey Rebellion. It has both architectural and historic importance, and was designated a National Historic Landmark in 1983. It is open weekly between April and November, or by appointment.
The Edward G. Acheson House is a historic house at 908 West Main St. in Monongahela, Washington County, Pennsylvania, United States. Probably built about 1870, it is notable as the home of Edward G. Acheson (1856-1931), the inventor of carborundum, and as the likely site of its invention. It was designated a National Historic Landmark in 1976.
The F. Julius LeMoyne House is a historic house museum at 49 East Maiden Street in Washington, Pennsylvania. Built in 1812, it was the home of Dr. Francis Julius LeMoyne (1798–1897), an antislavery activist who used it as a stop on the Underground Railroad. LeMoyne also assisted in the education of freed slaves after the American Civil War, founding the historically black LeMoyne–Owen College in Memphis, Tennessee. His house, now operated as a museum by the local historical society, was designated a National Historic Landmark in 1997. It is designated as a historic public landmark by the Washington County History & Landmarks Foundation.
Bethel African Methodist Episcopal Church of Monongahela City is a historic church at the junction of 7th and Main Streets in Monongahela City, Pennsylvania.
The East Washington Historic District is a historic district in East Washington, Pennsylvania that is listed on the National Register of Historic Places. It is designated as a historic district by the Washington County History & Landmarks Foundation.
The LeMoyne Crematory was the first crematory in the United States. Francis Julius LeMoyne had it built in 1876 on his own land, perched atop a location known locally as Gallow's Hill in North Franklin Township near Washington, Pennsylvania. The first cremation took place on December 6, 1876. LeMoyne believed that cremation was a more sanitary way to dispose of bodies, preventing the contamination of drinking water. After 41 more cremations there, the crematory was closed in 1901. LeMoyne's remains are buried there.
The Sackville House was a historic building in East Washington, Pennsylvania. It was located at 309 East Wheeling Street in Washington, Pennsylvania before it was demolished in 1980.
The Canonsburg Armory is a former Pennsylvania National Guard armory in Canonsburg, Pennsylvania. It was listed on the National Register of Historic Places on December 22, 1989.
The Pennsylvania Railroad Freight Station, also called the Chartiers Valley Railway Freight Station, is a historic, former train station building in Washington, Pennsylvania. It was listed on the National Register of Historic Places on July 21, 1995.
Thomas Munce House is a historic house in South Strabane Township, Washington County, Pennsylvania. The earliest section was built in c. 1803 with additions in c. 1810 and 1835. The house is 2 1⁄2-story, stone, vernacular, Georgian-influenced with a gabled roof and a façade with five openings. The house is representative of the more substantial second-generation houses built to replace earlier log houses in Washington County.
The Washington Armory is a former Pennsylvania National Guard armory in Washington, Pennsylvania. It was designed by W. G. Wilkins Company. It was listed on the National Register of Historic Places on May 9, 1991.
The California Area Public Library is the public library serving California, Pennsylvania and is a branch of the Washington County Library System. The library is located in the former Pennsylvania Railroad Passenger Station, which was listed on the National Register of Historic Places in 1979.
Beallsville Historic District is a 40-acre (16 ha) historic district in Beallsville, Pennsylvania. It is designated as a historic district by the Washington County History & Landmarks Foundation.
Centerville Historic District is a historic district in Centerville, Pennsylvania. Centerville represents an intact example of the "pike town" typical of the National Road in Pennsylvania. Little commercial activity remains in the town today, but the ninety-four contributing buildings in the district includes taverns, residences, shops, and services buildings typical of the rise and decline of the National Road.
Harrison House was a historic building in Centerville, Pennsylvania. It was built c. 1845 as a Post Colonial Greek Revival house, and later updated to a High Victorian Italianate style. The five-bay 2 1⁄2-story structure with a two-story bay window unit with a turret roof and a four-story tower was unusual for the Washington County, Pennsylvania area.
Jennings–Gallagher House is a historic building in California, Pennsylvania.
Old Main is a historic building in the California University of Pennsylvania campus in California, Pennsylvania.
United States Post Office—Charleroi is a historic building in Charleroi, Pennsylvania
