On May 23, 1822, the first Frederick Cattle Show, the forerunner of The Great Frederick Fair, was held at the Hessian Barracks, off South Market Street in Frederick.
On May 23, 1843, Eva Catherine Schley Bier, supposedly the first child born in Fredericktown, died at 94.
On May 23, 1850, Enoch Louis Lowe was nominated to be Maryland's governor. He lived on East Second Street in Frederick. He became the youngest man ever elected governor of Maryland.
On May 23, 1854, Mt. Olivet Cemetery in Frederick was dedicated.
On May 23, 1855, Frederick City officials passed an ordinance to allow the waters of the Little Tuscarora Creek into the town’s reservoir.
On May 23, 1865, Farmers & Mechanics Bank was chartered as a national bank.
On May 23, 1900, the Masonic Temple Association bought the property of the late William F. Miller on West Church Street in Frederick for $7,000. The lot was 63 by 135 feet. A newly constructed temple was dedicated on December 12, 1902.
On May 23, 1922, the Kiwanis Club of Frederick was organized at a meeting at The Wayside Inn on East Patrick Street in Frederick, just east of the Carroll Creek.
On May 23, 1923, Grace Episcopal Church in Brunswick was dedicated. It had a seating capacity of 320. After its debt was retired, the church was consecrated on May 21, 1928.
On May 23, 1974, Sue Baumgardner, wife of embattled Sheriff Richard Baumgardner, filed for her husband's position in the upcoming election, becoming the first woman to seek the job.
On May 23, 1990, Charles Ernest Keller, better known as "King Kong" Keller when he played baseball for The New York Yankees and the Detroit Tigers, died in Frederick at age 73. He was born September 12, 1916, in Middletown.