Baltimore (/?b??lt??m??r/, locally: [?b??.m??]) is the largest city in the U.S. state of Maryland, and the 29th-most populous city in the country. It was established by the Constitution of Maryland and is not part of any county, thus it is the largestindependent city in the United States.
The city has 289 properties listed on the National Register of Historic Places. The historical records of the government of Baltimore are located at the Baltimore City Archives. The city is named after Cecil Calvert, second Lord Baltimore, (1605–1675), of the Irish House of Lords and founding proprietor of the Province of Maryland. Baltimore Manor was the name of the estate in County Longford on which the Calvert family lived in Ireland. Baltimore is an anglicization of the Irish name Baile an Tí Mhóir, meaning "town of the big house."