Paper Birch – Betula papyrifera

At the top of the list of tallest buildings in Philadelphia is the 60-story Comcast Technology Center, which topped out at 1,121 feet (342 m) in Center City on November 27, 2017 and was completed in 2018. Comcast Technology Center is the tallest building outside lower Manhattan and Chicago, and is the tenth-tallest building in the United States, as of 2019. Philadelphia is home to more than 300 completed high-rise buildings up to 330 feet (100 m), and 56 completed skyscrapers of 330 feet (100 m) or taller, of which 31 are 400 feet (122 m) or taller.

The second-tallest building in Philadelphia is the 58-story Comcast Center at 974 feet (297 m), while the third-tallest building is One Liberty Place, which rises 61 floors and 945 feet (288 m). One Liberty Place stood as the tallest building in Pennsylvania for over 20 years until the completion of Comcast Center in 2008. Overall, seven of the ten tallest buildings in Pennsylvania are in Philadelphia, with the remainder being in Pittsburgh. Philadelphia is one of only five American cities with two or more completed buildings over 900 feet (270 m) tall, the others being New York City, Chicago, Houston, and Los Angeles.

Philadelphia's history of tall buildings is generally thought to have begun with the 1754 addition of the steeple to Christ Church, which was one of America's first high-rise structures. Through most of the 20th century, a "gentlemen's agreement" prevented buildings from rising higher than the 548-ft (167-m) Philadelphia City Hall. The completion of One Liberty Place in 1987 broke the agreement, and Philadelphia has since seen the construction of ten skyscrapers that eclipse City Hall in height.

Philadelphia has twice held the tallest habitable building in North America, first with Christ Church, then with City Hall. The latter reigned as the world's tallest building from 1894 to 1908, and is currently the world's second-tallest masonry building, only 1.6 feet (0.49 m) shorter than Mole Antonelliana in Turin. Like other large American cities, Philadelphia went through a massive building boom in the 1970s and 1980s, resulting in the completion of 20 skyscrapers of 330 feet (100 m) or taller.

Shibe Park, known later as Connie Mack Stadium, was a baseball park located in North Philadelphia. The stadium was the home of the Philadelphia Athletics of the American League (AL) and the Philadelphia Phillies of the National League (NL). When it opened on April 12, 1909, Shibe Park was baseball's first steel-and-concrete stadium. Homeowners on both Somerset Street and 20th Street had a great view of the games due to the low outfield fences. A left field bleacher section was added in 1913 that blocked the view for the people on Somerset Street; however, the view was still clear from the roofs, bedroom bay windows, and porch roofs along 20th Street. Pathé News, Universal Newsreel and Movietone News even set up cameras at 2739 North 20th as part of their World Series coverage. The last game was held on October 1, 1970 and the stadium was eventually demolished in 1976.

George B. McClellan was a major general during the American Civil War. He organized the famous Army of the Potomac and served briefly (November 1861 to March 1862) as the general-in-chief of the Union Army. Early in the war, McClellan played an important role in raising a well-trained and organized army for the Union. Although McClellan was meticulous in his planning and preparations, these attributes may have hampered his ability to challenge aggressive opponents in a fast-moving battlefield environment. He chronically overestimated the strength of enemy units and was reluctant to apply principles of mass, frequently leaving large portions of his army unengaged at decisive points. McClellan's Peninsula Campaign in 1862 ended in failure, with retreats from attacks by General Robert E. Lee's smaller army and an unfulfilled plan to seize the Confederate capital of Richmond. His performance at the bloody Battle of Antietam blunted Lee's invasion of Maryland, but allowed Lee to eke out a precarious tactical draw and avoid destruction, despite being outnumbered. As a result, McClellan's leadership skills during battles were questioned by U.S. President Abraham Lincoln, who eventually removed him from command, first as general-in-chief, then from the Army of the Potomac. Lincoln was famously quoted as saying, "If General McClellan does not want to use the army, I would like to borrow it for a time." Despite this, he was the most popular of that army's commanders with its soldiers, who felt that he had their morale and well-being as paramount concerns. McClellan became the unsuccessful Democratic nominee opposing Lincoln in the 1864 presidential election. His party had an anti-war platform, promising to end the war and negotiate with the Confederacy, which McClellan was forced to repudiate, damaging the effectiveness of his campaign. He served as the 24th Governor of New Jersey from 1878 to 1881.

• ... that exhibits at Peale's Philadelphia Museum included the first nearly complete skeleton of a mastodon?
• ... that the Octavius V. Catto Memorial, unveiled in 2017, contains the first statue on Philadelphia public property of a specific African American?
• ... that Greyhound Electronics enlisted the help of the Scarfo crime family to sell its video poker machines?
• ... that Philadelphia Eagles wide receiver Britain Covey played quarterback in high school and led his team to 26 consecutive wins?
• ... that in 2018, Donald Trump disinvited the Philadelphia Eagles from a Super Bowl LII victory ceremony at the White House after several players said they were not going to attend?
• ... that the 1834 Philadelphia race riot began at a carousel before spreading to other parts of the city?
• ... that episodes of such game shows as Double Dare, Finders Keepers, and You Bet Your Life were filmed at the Philadelphia studios of a public TV station?
• ... that in the 1932 baseball game in which pitcher Eddie Rommel won his last game, he pitched 17 innings in relief, an American League record?

• June 1, 1829 - The Pennsylvania Inquirer, now called The Philadelphia Inquirer, is founded by John R. Walker and John Norvell.
• June 6, 2008 - The Comcast Center, the tallest building in Philadelphia from 2008–2017, is officially opened.
• June 18, 1778 - American Revolutionary War: British soldiers, under General Clinton, evacuate Philadelphia.
• June 23, 1866 - The Chestnut Street Bridge, the second bridge to connect Center City Philadelphia and West Philadelphia, is opened.

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