1. The Battle of Princeton: On January 12, 1777, one of the most significant battles in the American Revolution took place in Princeton, New Jersey. However, many soldiers who fought in this battle were from Pennsylvania.

2. The Pennsylvania State Capitol: On January 12, 1905, construction began on the Pennsylvania State Capitol building in Harrisburg. This grand structure, designed in the Beaux-Arts style, was completed in 1908.

3. The First Automobile Show: On January 12, 1900, the first automobile show in the United States was held in New York City. Among the car manufacturers that showcased their vehicles at this event was the Pennsylvania-based Winton Motor Carriage Company.

4. The Liberty Bell: On January 12, 1915, the Liberty Bell, which is famously associated with Philadelphia, was rung in honor of the birthday of Benjamin Franklin, one of America's founding fathers.

5. The Philadelphia 76ers: On January 12, 1977, the Philadelphia 76ers basketball team set a record for the fewest points scored in a game since the adoption of the shot clock. They managed to score only 66 points in a loss to the Seattle SuperSonics.