Why PA is called the Keystone State?

Pennsylvania’s essential role in the founding of the United States earned it the nickname, the “Keystone State.” The term “keystone” comes from architecture and refers to the central, wedge-shaped stone in an arch, which holds all the other stones in place. During the early days of our nation, Pennsylvania held a key position geographically, economically, and politically.
Today the keystone is a popular symbol of Pennsylvania — it’s even used as an official symbol of Pennsylvania state government. Each Pennsylvania state agency has its own variation of the keystone as its logo.

State Motto
Pennsylvania’s motto is “Virtue, Liberty, and Independence.”

State Coat of Arms
Pennsylvania’s coat of arms is one of the most familiar of our state emblems.
The coat of arms features a shield that shows symbols of Pennsylvania’s strengths — a ship to show state commerce being carried worldwide, a plow to show Pennsylvania’s rich natural resources, and three sheaves of wheat to show fertile fields and Pennsylvania’s wealth of human thought and action. An olive branch and cornstalk also cross beneath the shield — symbols of peace and prosperity. The state motto appears beneath.

State Flag
The first state flag of Pennsylvania was authorized by the General Assembly in 1799. Pennsylvania’s flag features the state coat of arms on a field of blue.

State Bird: Ruffed Grouse
This brown, chicken-like bird gets its name from the black “ruffs” on the side of its neck. The ruffed grouse was an important part of the food supply for early settlers, and it’s still a familiar sight in Pennsylvania forests today.

State Dog: Great Dane
In frontier Pennsylvania, Great Danes were used as a hunting and working breed. Pennsylvania founder William Penn even had a Great Dane — a portrait of Penn and his Great Dane hangs in the governor’s Reception Room in the Pennsylvania Capitol.

State Animal: White-tailed Deer
Native Americans and settlers alike relied on the white-tailed deer for food and clothing. The white-tailed deer continues to flourish in forests across Pennsylvania.

State Tree: Eastern Hemlock
Eastern hemlocks are a common sight in Pennsylvania forests. A slow-growing, long-lived tree, the eastern hemlock can take 250-300 years to reach maturity and may live for 800 years or more.

State Flower: Mountain Laurel
Mountain laurel is an evergreen shrub native to the eastern United States. Its fragrant star-shaped white and pink flowers have attracted travelers since early colonial days. Each spring, Pennsylvania’s mountainsides come alive with the pink blooms of mountain laurel.

State Fish: Brook Trout
Brook trout are the only trout species native to Pennsylvania. With a preference for clear and pure water, brook trout are at home in Pennsylvania’s 4,000 miles of cold water streams.

State Insect: Firefly
Whether you call them fireflies or lightning bugs, these luminous insects brighten Pennsylvania nights all summer long.

State Amphibian: Eastern Hellbender
The Eastern hellbender is the largest salamander in North America. Hellbenders can only survive in clean water, and their population has been on the decline. The official title as state amphibian is meant to bring attention to efforts to preserve their habitats.