United States Post Office-Main Branch

2970 Market St., Philadelphia, PA
Local significance of the building:
Architecture; Politics/government

Listed in National Register of Historic Places in 2006.
  A brief timeline of the history of the United States Postal Service (USPS)
  • 1775: The Second Continental Congress establishes the Constitutional Post to provide postal services in the thirteen American colonies. Benjamin Franklin is appointed as the first Postmaster General.

  • 1792: The Postal Service Act is passed, officially establishing the United States Postal Service as a federal agency. It sets the foundation for the organization and regulation of postal operations.

  • 1847: The introduction of prepaid adhesive postage stamps revolutionizes mail delivery, simplifying the process and promoting efficiency.

  • 1860: The Pony Express, a fast mail delivery service, is launched to transport mail between the eastern and western regions of the United States. It becomes famous for its daring riders and swift delivery.

  • 1863: Free city delivery is introduced, allowing mail to be delivered directly to urban households and businesses rather than being picked up from local post offices.

  • 1864: The Postal Money Order system is established, providing a secure way for people to send money through the mail.

  • 1896: Rural Free Delivery (RFD) is implemented, bringing mail delivery to rural areas for the first time. This service significantly improves communication and connects rural communities to the rest of the country.

  • 1971: The United States Postal Service is reorganized as an independent agency within the federal government, operating as the USPS. It is no longer directly controlled by the Postmaster General.

  • 1974: The USPS introduces the ZIP (Zone Improvement Plan) Code system, which assigns unique codes to geographic areas to improve mail sorting and delivery efficiency.

  • 1997: The USPS launches its website, usps.com, providing online access to postal services, tracking, and information.

  • 2001: Following the 9/11 terrorist attacks, the USPS faces security challenges and undergoes significant changes to enhance mail screening and protection.

  • 2013: The USPS announces the end of Saturday mail delivery for regular letters and reduces delivery to five days a week.

  • Present: The USPS continues to be a vital service, handling billions of pieces of mail annually and adapting to changes in technology, communication, and the shipping industry. It plays a crucial role in connecting people, facilitating commerce, and serving as a backbone of the American communication infrastructure.

This timeline provides an overview of key milestones in the history of the USPS, which has played a crucial role in facilitating communication and connecting communities throughout the United States for over two centuries.

The National Register of Historic Places is the official list of the Nation’s historic places worthy of preservation. Authorized by the National Historic Preservation Act of 1966, the National Park Service’s National Register of Historic Places is part of a national program to coordinate and support public and private efforts to identify, evaluate, and protect America’s historic and archeological resources.

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The first World Series of Major League Baseball was held in Pittsburgh in 1903.
Philadelphia County, located in the southeastern part of Pennsylvania, has a rich and diverse history that spans more than three centuries. Its history can be traced back to the late 17th century when William Penn founded the city of Philadelphia in 1682 as the capital of the Pennsylvania Colony. The area, originally inhabited by indigenous Lenape people, quickly grew into a major center for trade, commerce, and governance.

During the 18th century, Philadelphia became a hotbed of political activity and played a significant role in the American Revolution. It was in Philadelphia that the Second Continental Congress met and adopted the Declaration of Independence in 1776. The city also served as the temporary capital of the United States from 1790 to 1800, while Washington, D.C., was under construction.

In the 19th century, Philadelphia County experienced significant industrial growth, becoming a major center for manufacturing and transportation. The county’s location along the Delaware River made it an ideal hub for the shipping and textile industries. Immigrants from various countries, including Ireland, Italy, and Germany, flocked to Philadelphia in search of employment opportunities, leading to a demographic shift and cultural diversity within the county.

In the 20th century, Philadelphia County faced its fair share of challenges and underwent periods of economic decline. However, the city and county have since revitalized and reinvented themselves as a dynamic and thriving metropolis. Today, Philadelphia County is known for its rich history, vibrant arts and culture scene, iconic landmarks such as Independence Hall and the Liberty Bell, and its role as a major center for education and healthcare.

This timeline provides a glimpse into the major events and milestones that have shaped the history of Philadelphia County, Pennsylvania.

  • 1624 - Dutch explorer Cornelius Jacobsen Mey claims the area for the Dutch Republic
  • 1682 - William Penn founds the city of Philadelphia as the capital of the Pennsylvania colony
  • 1701 - Philadelphia becomes a separate county, known as Philadelphia County
  • 1774-1778 - Philadelphia serves as the temporary capital of the United States during the Revolutionary War
  • 1787 - Pennsylvania State House (now Independence Hall) hosts the Constitutional Convention
  • 1800-1830 - Philadelphia experiences rapid industrial growth and becomes a major manufacturing center
  • 1844 - Consolidation Act merges Philadelphia City and Philadelphia County into a single governmental entity
  • 1861-1865 - Philadelphia supports the Union during the American Civil War
  • 1876 - Philadelphia hosts the Centennial Exposition to celebrate the 100th anniversary of the Declaration of Independence
  • 1901 - Philadelphia's population exceeds one million, becoming the third-largest city in the United States
  • 1952 - Independence National Historical Park is established, encompassing many key historic sites in Philadelphia
  • 1976 - Philadelphia celebrates the United States' Bicentennial with various events and festivities