1. On April 27, 1684, the first recorded shipment of Pennsylvania flour was sent to England. This event marks the beginning of the state's significant role in the global grain trade.

2. In 1777, the Continental Congress ratified the Articles of Confederation in York, Pennsylvania. These papers established the first national government of the United States.

3. On April 27, 1822, the Pennsylvania Agricultural Society was founded to promote scientific farming practices and improve agricultural education. The organization still exists today and hosts an annual Farm Show in Harrisburg.

4. In 1855, the Saint Vincent College, the first Benedictine institution in the United States, was founded in Latrobe, Pennsylvania. It is still considered one of the best liberal arts colleges for students to attend.

5. On April 27, 1945, the Nazi concentration camp Buchenwald was liberated by American troops. Over 21,000 prisoners were released, many of whom were starving and sick. The atrocities of the Holocaust have had a significant impact on Pennsylvania's history through the lives of survivors and the contributions of the state's Jewish community.