Question:  Muir Site is located in this region of Kentucky which makes up what part of the state?

Context paragraphs:
My Old Kentucky Home State Park: My Old Kentucky Home State Park is a state park located in Bardstown, Kentucky.  The park's centerpiece is Federal Hill, a farm owned by United States Senator John Rowan in 1795.  During the Rowan family's occupation, the mansion became a meeting place for local politicians and hosted several visiting dignitaries.  The farm is best known for its association with American composer Stephen Foster's anti-slavery ballad "My Old Kentucky Home, Good Night".  Foster was a cousin of the Rowan family, and was likely inspired to write the ballad both by Harriet Beecher Stowe's anti-slavery novel Uncle Tom's Cabin and through imagery seen on visits to Federal Hill.  After popularity of the song increased throughout the United States, Federal Hill was purchased by the Commonwealth of Kentucky, dedicated as a historic site, and renamed "My Old Kentucky Home" on July 4, 1923.  Foster's song by the same name was made the state song of Kentucky in 1928.  The Federal Hill mansion was featured on a U.S. postage stamp in 1992, and it is one of the symbols featured on the reverse of the Kentucky state quarter issued in 2001.

Muir Seamount: Muir Seamount is a seamount (underwater volcano), located at .  It is located in the Bermuda rise, a seismically active region, and was the site of an earthquake on 24 March 1978.

John Muir National Historic Site: The John Muir National Historic Site is located in the San Francisco Bay Area, in Martinez, Contra Costa County, California.  It preserves the 14-room Italianate Victorian mansion where the naturalist and writer John Muir lived, as well as a nearby 325-acre (132 ha) tract of native oak woodlands and grasslands historically owned by the Muir family.  The main site is on the edge of town, in the shadow of State Route 4, also known as the "John Muir Parkway."

Muir, Pennsylvania: Muir is a census-designated place located in Porter Township, Schuylkill County in the state of Pennsylvania.  Muir was part of the Reinerton-Orwin-Muir CDP at the 2000 census before splitting into three individual CDPs for the 2010 census.  The other communities, along with Muir are Reinerton and Orwin.  The community is located near the borough of Tower City along U.S. Route 209.  As of the 2010 census the population was 451 residents.

Muir Site: The Muir Site, (15JS86), is an Early Fort Ancient culture archaeological site located in Jessamine County, Kentucky, in the Bluegrass region of the state.  It was occupied from about 1010 to 1255 CE during the Osborne Phase of the local chronology.  The site is near Jessamine Creek, on top of a broad ridge.  Unlike later Fort Ancient villages, which are more compact, the Muir site structures were spread out over the ridge top.  These structures were rectangular with single set post construction, as opposed to Mississippian style wall trench construction.  Within the houses were 30 cm to 50 cm deep floor basins with centrally located hearths for cooking and heating.  Pottery found at the Muir site was limestone tempered, unlike some later Fort Ancient pottery which became mussel shell tempered after contact with Mississippian cultures.

Orwin, Pennsylvania: Orwin is a census-designated place located in Porter Township, Schuylkill County in the state of Pennsylvania.  Orwin was part of the Reinerton-Orwin-Muir CDP at the 2000 census before splitting into three individual CDPs for the 2010 census.  The other communities, along with Orwin are Reinerton and Muir.  The community is located near the community of Muir along U.S. Route 209.  As of the 2010 census the population was 314 residents.

Constitution Square Historic Site: Constitution Square Historic Site is a 3 acre park and open-air museum in Danville, Kentucky.  From 1937 to 2012, it was a part of the Kentucky state park system and operated by the Kentucky Department of Parks.  When dedicated in 1942, it was known as John G. Weisiger Memorial State Park, honoring the brother of Emma Weisiger, who donated the land for the park.  Later, it was known as Constitution Square State Shrine and then Constitution Square State Historic Site.  On March 6, 2012, the Department of Parks ceded control of the site to the county government of Boyle County, Kentucky, and its name was then changed to Constitution Square Historic Site.

Reinerton, Pennsylvania: Reinerton is a census-designated place located in Porter Township, Schuylkill County in the state of Pennsylvania.  Reinerton was part of the Reinerton-Orwin-Muir CDP at the 2000 census before splitting into three individual CDPs for the 2010 census.  The other communities, along with Reinerton are Orwin and Muir.  The community is located near the community of Muir along U.S. Route 209.  As of the 2010 census the population was 424 residents.

Bluegrass region: The Bluegrass region (Shawnee: Eskippakithiki) is a geographic region in the U.S. state of Kentucky.  It makes up the northern part of the state where a majority of the state's population has lived and developed its largest cities.

Wickliffe Mounds: Wickliffe Mounds (15 BA 4) is a prehistoric, Mississippian culture archaeological site located in Ballard County, Kentucky, just outside the town of Wickliffe, about 3 mi from the confluence of the Ohio and Mississippi rivers.  Archaeological investigations have linked the site with others along the Ohio River in Illinois and Kentucky as part of the Angel Phase of Mississippian culture.  Wickliffe Mounds is controlled by the State Parks Service, which operates a museum at the site for interpretation of the ancient community.  Listed on the National Register of Historic Places, it is also a Kentucky Archeological Landmark and State Historic Site.

Supporting paragraphs: Muir Site Bluegrass region
Answer: northern