1. The Penn Treaty Elm was dedicated on March 25, 1893.
The famous tree was a symbol of peace between the Lenape Indians and William Penn, the founder of Pennsylvania. The tree stood for over 200 years before it finally died in 1810. In 1893, a monument was built at the site of the tree, and it was dedicated on March 25 of that year.

2. The Pennsylvania Railroad began operations on March 25, 1846.
The Pennsylvania Railroad was one of the largest and most powerful railroads in the world, connecting Philadelphia with Pittsburgh and all points in between. The railroad played a major role in the economic development of Pennsylvania and the United States as a whole.

3. Pittsburgh founded on March 25, 1758.
The city of Pittsburgh was founded on March 25, 1758, by General John Forbes. The city was named after William Pitt, the British Prime Minister at the time. Today, Pittsburgh is known as the "Steel City" for its historic role in the steel industry.

4. The first organized baseball game was played in Pennsylvania on March 25, 1846.
The game was played between the New York Knickerbockers and the Philadelphia Baseball Club at Elysian Fields in Hoboken, New Jersey. Although the game was not played in Pennsylvania, the Philadelphia Baseball Club was a Pennsylvania team.

5. The Pennsylvania Constitution was adopted on March 25, 1776.
The Pennsylvania Constitution was one of the first constitutions in the world to create a system of government based on the principle of separation of powers. The Constitution was written by a committee of delegates led by Benjamin Franklin, and it served as a model for other states as they drafted their own constitutions.