As an AI language model, here are five interesting facts about June 26 in Connecticut history:

1. In 1787, the Connecticut Compromise was proposed during the Constitutional Convention in Philadelphia. This compromise, also known as the Great Compromise, established a bicameral legislature, with one chamber based upon proportional representation and the other based upon equal representation for each state.

2. In 1819, Norwich University was founded in Norwich, Connecticut. It is the oldest private military college in the United States and remains a prestigious institution today.

3. In 1909, the first municipal airport in the United States opened in New Haven, Connecticut. This airport became the foundation for the Tweed New Haven Regional Airport, which still serves the New Haven area today.

4. In 1974, the Connecticut state legislature passed the nation's first law banning discrimination based on sexual orientation in employment, housing, and public accommodations. This landmark legislation set an important precedent for LGBTQ+ rights across the country.

5. In 1993, Mystic Aquarium in Mystic, Connecticut opened the "Titanic - 12,450 Feet Below" exhibit. This exhibit displayed artifacts and replicas from the wreckage of the Titanic and gave visitors a chance to experience the mystique and tragedy of the ill-fated ocean liner.