The Battle of Gettysburg, fought in July 1863 around Gettysburg, was the bloodiest battle of the American Civil War with over 51,000 Union and Confederate casualties, and resulted in a repulsion of the Confederacy's invasion of the North. Throughout the late 19th and 20th centuries, the state's steel production and manufacturing-based economy contributed to the development of much of the nation's early infrastructure, including key bridges, skyscrapers, and military hardware used in U.S.-led victories in World War I, World War II, and the Cold War. In the 21st century, Pennsylvania has garnered the nickname "Cellicon State" for the central role of Philadelphia and Pittsburgh in the development of immunotherapies to treat different cancers. (Full article...)
Featured article -
This is a Featured article, which represents some of the best content on English Wikipedia..
The front of the mansion, with the 1913 addition at left
After 1903 the house served as the Ricketts family's summer home; they kept it even as they sold over 65,000 acres (26,000 ha) to the state of Pennsylvania from 1920 to 1950. The house was included in the Historic American Buildings Survey (HABS) in 1936 and listed on the National Register of Historic Places (NRHP) in 1983. A group of investors bought the lake, surrounding land, and house in 1957 and developed them privately for housing and recreation. The house became the Ganoga Lake Association's clubhouse, and is not open to the public. (Full article...)
The bridge was 75 feet (23 m) long, with an arch that spanned 44 feet (13 m), a deck 18 feet 8 inches (5.69 m) wide, and a roadway width of 15 feet 3 inches (4.65 m). It carried a single lane of traffic. In the 19th century, the bridge and its road were used by the lumber, leather, and coal industries active along the creek. By the early 20th century, these industries had almost entirely left, and the villages declined. The area the bridge served reverted mostly to second growth forest and it was used to access Pennsylvania State Game Lands and a state pheasant farm. (Full article...)
Funded in conjunction with PNC Park and the David L. Lawrence Convention Center, the $281 million (equivalent to $499 million in 2024) stadium stands along the Ohio River, on the North Side of Pittsburgh in the North Shore neighborhood. The stadium was designed with the city's history of steel production in mind, which led to the inclusion of 12,000 tons of steel into construction. Ground for the stadium was broken in June 1999, and the first football game was hosted in September 2001. The stadium's natural-grass surface has been criticized throughout its history, but Steelers owners have kept the grass after lobbying from players and coaches. The 68,400-seat stadium has sold out for most Steelers home games, a streak that dates to 1972. A collection of Steelers and Panthers memorabilia is in the Great Hall. (Full article...)
Image 5The Battle of Gettysburg, an 1887 portrait by Thure de Thulstrup depicting the Battle of Gettysburg, fought over three days from July 1 to 3, 1863, in Gettysburg. It was the deadliest battle ever fought on American soil and the bloodiest battle in all of American military history. But the Union army's victory at Gettysburg proved the Civil War's turning point, paving the way for the Union's ultimate victory two years later and the nation's preservation. (from Pennsylvania)
Image 6One of only two confirmed photos of Abraham Lincoln (sitting in center, facing camera, without his traditional top hat) at Gettysburg a few hours prior to giving the Gettysburg Address at Gettysburg National Cemetery on November 19, 1863. The address, which was only 271 words in length, ranks among the most famed speeches in American history. (from History of Pennsylvania)
Image 8Bethlehem Steel in Bethlehem was one of the world's leading steel manufacturers for most of the 20th century. In 1982, however, it discontinued most of its operations, declared bankruptcy in 2001, and was dissolved in 2003. (from Pennsylvania)
Image 27The locomotive Tioga in Philadelphia in 1848; Pennsylvania was an important railroad center throughout the 19th century. (from History of Pennsylvania)