The City of Philadelphia, World Heritage Site

The cradle of the United States, Philadelphia, will today officially join the list of UNESCO World Heritage cities. This city becomes the first urban center in the United States to receive such recognition and adds to the 266 sites worldwide that are already included in this list.

Philadelphia is the place where the Declaration of Independence was signed in 1776, the Articles of Confederation uniting the Thirteen Colonies were established in 1780, and where George Washington presided over the signing of the United States Constitution in 1787. All of this took place in Independence Hall - a World Heritage Site since 1979 - which is why it is now included in the UNESCO World Heritage cities list.

And indeed, "Philly," as it is commonly known in the United States, also features a historic district that highlights the neoclassical style of some of its colonial buildings, with red brick and marble taking center stage. In addition, there are early 20th-century buildings that showcase federal architecture and Greek revival architecture.

History, culture, and architecture united in one city: Philadelphia.