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Center City Allentown is the downtown and central business district of Allentown, Pennsylvania, the third largest city in the U.S. state of Pennsylvania. It has a dense population and is currently undergoing an urban revitalization process.

The Diocese of Allentown (Latin: Diœcesis Alanpolitana) is a Latin Church ecclesiastical jurisdiction, or diocese, of the Catholic Church in the Lehigh Valley region of Pennsylvania in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Philadelphia. The mother church of the Diocese of Allentown is the Cathedral Church of Saint Catharine of Siena Allentown. As of 2023, the bishop of Allentown is Alfred A. Schlert. The Diocese of Allentown covers Berks, Carbon, Lehigh, Northampton and Schuylkill counties. It has a Catholic population of 258,997 as of 2015, approximately 20.4% of the total population. The diocese maintains 80 parishes, 30 Catholic elementary schools, and seven Catholic high schools.

Allentown (Pennsylvania Dutch: Allenschteddel, Allenschtadt, or Ellsdaun) is a city in the Commonwealth of Pennsylvania and the county seat of Lehigh County, in the United States. It is the third-most-populous city in Pennsylvania with a population of 125,845 as of the 2020 census and the largest city in the Lehigh Valley metropolitan area, which had a population of 861,899 and was the 68th-most populous metropolitan area in the nation as of 2020.Founded in 1762, Allentown is located on the Lehigh River, a 109-mile-long (175 km) tributary of the Delaware River. It is the largest of three adjacent cities, including Bethlehem and Easton in Lehigh and Northampton counties, in the Lehigh Valley region of eastern Pennsylvania. Allentown is located 48 miles (77 km) north of Philadelphia and 78 miles (126 km) west of New York City.

The Allentown Parking Authority is responsible for both off and on-street parking within the City of Allentown, Pennsylvania.The Allentown Parking Authority owns and manages five parking garages in Center City Allentown and leases 29 surface lots plus one parking ramp which make up a total of over 4,020 parking spaces. The Allentown Parking Authority is responsible for the enforcement of both City and State parking regulations, by way of parking tickets, towing, wheel booting, and impounding vehicles. The Allentown Parking Authority currently regulates over 1,500 parking meters in the city.

Union Baptist Church is a Baptist church in Allentown, Pennsylvania, United States. It is a historically black church that was founded by the Reverend Dr Horace A Melton.

The PPL Building, formerly the Pennsylvania Power and Light Building, is a 24-story office building in Allentown, Pennsylvania. At 98.02 m (321.6 ft) in height, it is the tallest building in the city and the surrounding Lehigh Valley metropolitan area. The building is the headquarters for PPL Corporation, the main electricity provider for the Lehigh Valley, Northeastern Pennsylvania, and other regions of Pennsylvania and the United States. The PPL Building is often uniquely illuminated at night, especially during the Christmas season, with a candle on one face of the building, and a Christmas tree on the other.

The Allentown Masonic Temple is an historic Masonic building located in the city of Allentown in Lehigh County, Pennsylvania. It was added to the National Register of Historic Places in 2004.

Hamilton Street is a major thoroughfare and historic street in the Center City section of Allentown, Pennsylvania. The street dates back to 1762, when Allentown's founder, William Allen, included it as one of the first of several streets to be constructed in the city.The street is named for James Hamilton, who served as the mayor of Philadelphia from 1745 to 1746, and two terms as deputy governor of the colonial-era Province of Pennsylvania, from 1759 to 1763, and 1748 to 1754.

The Allentown National Bank, originally named the Allentown Bank, is an historic bank building located on Centre Square in Allentown, Lehigh County, Pennsylvania. Built in 1905, the building is a large eight-story, steel frame and masonry-clad structure in the Beaux-Arts style. Abandoned during the 1990s, it was re-developed into apartments for independent living senior citizens in the early 2000s. The building was added to the National Register of Historic Places in 2005.

The PPL Center is an 8,500 seat capacity indoor sports arena in Allentown, Pennsylvania. It opened on September 10, 2014. It is the home arena for the Lehigh Valley Phantoms of the American Hockey League, the primary development hockey team for the Philadelphia Flyers. The arena also hosts major concerts, sports, and entertainment events throughout the year.

The Dime Savings and Trust Company, also known as the First Valley Bank, is an historic bank building located in Allentown, Pennsylvania. It was built in 1925, and is a T-shaped, five-story red brick building. The base is sheathed in limestone, and the distinctive brick and limestone attic level is reflective of the Art Deco style.It was added to the National Register of Historic Places in 1985.

Helfrich's Springs Grist Mill is an historic grist mill which is located in Whitehall Township, Pennsylvania. The mill, which was built in 1807, is located along Jordan Creek. It was added to the National Register of Historic Places in 1977. A boundary increase in 1999 added the Peter Grim House with NRHP reference number 99001288.