Southwestern Pennsylvania

The southwestern corner of Pennsylvania is the area that was the original Washington County, formed on March 28, 1781. This is the land to the west of the Monongahela River, from the West Virginia line north and west and south of the Ohio River to the Ohio line. 

Parts of the original Washington County are now Greene and portions of Beaver and Allegheny Counties. Both Pennsylvania and Virginia initially claimed this Southwestern Pennsylvania portion of the Commonwealth.

The first National Road, Route 40, came through our area, along with endless visits by the famous surveyors George Washington, Lafayette, George Rogers Clark, James Monroe, Andrew Jackson, and many other renowned people.

Join Western Pennsylvania and Pittsburgh Museums to learn more about the county's notable ancestry—and possibly your own.

Southwestern Pennsylvania

Museums

Westmoreland Museum of American Art has a significant and distinctive collection of paintings, sculptures, furniture, and more. Its collection beautifully describes the heritage of our nation and region and is designed to enrich, enlighten, and delight viewers of all ages.
The Children's Museum of Pittsburgh is reaching Great Heights with exciting exhibits and programs for the young and young-at-heart.
Based on the private collections of Rachel McMasters Miller Hunt, the Hunt Institute was initially founded in 1961 as the Rachel McMasters Miller Hunt Botanical Library.
Pittsburgh is a place where one may delve into art, culture, architecture and find masterpieces renowned around the world. One of the must-visit places in this city is the Carnegie Museum of Art.
The Carnegie Museum of Natural History is one of the four Carnegie Museums of Pittsburgh found in 1896 by Andrew Carnegie.
The Mattress Factory is a modern museum that exhibits room-sized works called installations. Created on-site by artists from across the country and around the world, our unique exhibitions feature a variety of media that engage all of the senses.
The Johnstown Flood Museum is about one of the most shocking episodes of American history. On May 31, 1889, a neglected dam and a phenomenal storm led to a catastrophe in which 2,209 people died. The Johnstown Area Heritage Association receives many inquiries about the 1889 flood.
For over half a century, Jimmy Stewart has been a surrogate brother, father, and friend to fans of American film. His projections on the silver screen are so much more than the words in his scripts-- he made them our friends.
The present building, "Coates House," was made possible partly with a state grant administered through the Pennsylvania Historical and Museum Commission and other grants and funds raised by the Society. 
When Altoona lost the bid for the Commonwealth of Altoona Pennsylvania’s Railroad Museum in 1965, that didn’t stop local people from pursuing a Railroad Museum for Altoona.
A Brief History of the Pennsylvania Trolley Museum As automobiles and buses replaced streetcars more than a half century ago, a small group of people with a dream came together to form an organization dedicated to collecting, preserving, exhibiting and interpreting the the trolley e
Visit Tour-Ed Mine to learn about the history of mining coal. Take a trip through this educational coal mine and see how coal was dug by hand in 1850 and how modern hydraulic monsters mine coal today.
John Adam Hermann, Jr. was born on the North Side in 1858. He loved art and wanted to spend his entire life painting, but at the age of 18, he obediently went into his father's leather tanning business, located on East Ohio Street, in Allegheny City.
The A-K Valley Heritage Museum is located on the corner of Lock Street and East Seventh Avenue in Tarentum.
Experience the culture and refinement of the Gilded Age at the Frick Art & Historical Center, located on beautifully landscaped gardens in Pittsburgh's East End.
Rodef Shalom Biblical Botanical Garden was established in 1987. It is the largest biblical botanical garden in North America (1/3 acre) and the only one with an ongoing program of research and publication.
The Lawrence mansion is maintained as a house that evokes the elegant lifestyle of the Lawrences rather than a museum. It houses an excellent collection of original English and American antiques.
The museum which portrays the life and career of George Westinghouse, is focused on his career, accomplishments and inventions.
The Heinz Memorial Chapel began as a gift. Henry John Heinz, the founder of the Heinz Company established the building as a gift to his mother, Anna Margaretta Heinz. After Heinz’s death, his three surviving children added to his bequest to memorialize their grandmother and honor their father.
 Fort Roberdeau Historic Site and Natural Area includes an 1858 barn containing exhibits and a museum shop, an education center in an 1860 farmhouse, three nature trails, picnic facilities, and White Oak Hall, a large multipurpose facility.
The museum is operated by Historic Harmony, Inc., which was established in 1943.
The historical Flatiron Building was built circa 1830 directly on the National Road as a commercial structure. In addition to the historical age of the building, the shape takes the form of an old-fashioned clothing iron; it is a significant structure in the community.
The Cascade Antique Gallery is committed to providing an historical atmosphere with diverse products that keep our customers coming back time after time.

Organizations

The Allegheny-Kiski Valley Historical Society is a non-profit, permanent institution whose primary mission is interpreting, preserving, and celebrating our cultural, industrial, and ethnic heritage of the Allegheny and Kiskiminetas river valleys in southwestern Pennsylvania, a region embracing th
The Zelienople Historical Society maintains a museum in Passavant House of many of the original articles brought by Zelie. Growth. Early Zelienople commerce supported the local agriculture community as there was no viable means of transportation. In 1840 Zelienople was incorporated as a Borough.
Established in 1927, Butler County Historical Society's main goal was to preserve the history and culture of the county. Back in 1927 a group of locals of the county met to discuss what contiburtion they could make to portray the history of their society.  
The Indiana County Historical & Genealogical Society in western PA serves a largely rural area noted for its forest and mineral resources and its scenic beauty.
Once considered New Castle’s “best kept secret”, the word is out on the Hoyt Institute of Fine Arts and its vision to “provide the best possible arts to the greatest number of people”!
Incorporated on February 22, 1988, the Ellwood City Area Historical Society is dedicated to preserving and promoting the rich history of our community.
The Lawrence County Historical Society is located in New Castle. The home of former tin plate mogul, George Greer, it is resplendent in it's glorious woodwork and fine leaded beveled glass made by the Fry Glass Company in Rochester, Pennsylvania.