Rutherford County (218,292 inhabitants in 1803; 1,616 sq. km; seat, Murfreesboro) is located in the center of Tennessee, and nicknamed, accordingly, "The Heart of Tennessee". From the source above the following information can be
found "This is the official Rutherford County Flag as adopted by the Rutherford County Commission in August 2004."
With the help of the website of the Rutherford County Chamber of Commerce, I have been able to identify all elements shown on the county seal but one:
The cannon is identified on the website of the National Battlefield as a Parson's battery. "The men of Parsons' Battery, Batteries H & M of the Fourth U.S. Artillery, fired 2,199 cannon rounds during the Battle of Stones River. That was more than ten percent of all of the Union artillery rounds fired during the battle." www.nps.gov/stri/photosmultimedia/index.htm
The river is the Stones River.
The two-storey house is Sam Davis Home and Museum. "Sam Davis was a young Confederate Civil War soldier who, while acting as a courier, was tried and executed at the age of 21 for refusing to reveal the source of important information he was carrying. The Sam Davis Home, which was built along the banks of Stewarts Creek in 1820, rests on 168 acres of farmland. The two-story home is typical of a Southern, upper middle-class family of those times." www.rutherfordchamber.org/cvb/visitors/what-to-see/what-to-see-detail.php?PRKey=3
The building with the dome is the Rutherford County Courthouse. "Located on the Murfreesboro Downtown Square, the Rutherford County Courthouse is one of only six remaining Tennessee courthouses built before the Civil War. It is listed on the National Register of Historic Places for its significant architecture, political and military history. The interior of the courthouse has been restored to its 19th Century appearance." www.rutherfordchamber.org/cvb/visitors/what-to-see/what-to-see-detail.php?PRKey=6