1. In 1812, John F. Mercer was elected as the 16th Governor of Maryland on November 12, serving until 1815. He was instrumental in keeping Maryland neutral during the War of 1812 and worked to improve the state's infrastructure, including roads and canals.

2. On November 12, 1832, the famous abolitionist leader William Lloyd Garrison spoke in Baltimore at the Holliday Street Theatre. Despite facing angry opposition from pro-slavery groups, Garrison continued to advocate for the abolition of slavery throughout the country.

3. In 1909, the cornerstone for the Baltimore Museum of Art was laid on November 12, marking the beginning of the construction of the museum's original building. The museum has since become a cultural center for the city and houses an extensive collection of art from around the world.

4. On November 12, 1932, Maryland's first radio station, WFBR, began broadcasting in Baltimore. The station's call letters stood for "First Baltimore Radio" and it went on to become a popular news and music source for the city.

5. In 1995, Baltimore-born artist John Waters was awarded the Independent Spirit Award for Best Director for his film "Serial Mom," which was released earlier that year. The film, which starred Kathleen Turner, was a dark comedy about a woman who becomes a serial killer in suburbia. It has since become a cult favorite.