Question:  The Carlton House Block is a historic commercial and retail block at 9-13 Hampden Street in Springfield, a city in western New England, and the seat of Hampden County, Massachusetts, in which country?

Context paragraphs:
Hampden Bank: Hampden Bank (NASDAQ: HBNK , formerly Hampden Savings Bank) is one of two banks headquartered in Springfield, Massachusetts, (the other - NuVo Bank - was opened in Metro Center in 2009.)  Established in 1852, Hampden Bank is a full-service bank that serves people and businesses in Hampden County, Massachusetts, and in surrounding communities.  As of 2011, Hampden Bank has ten office locations in Springfield, Agawam, Longmeadow, West Springfield, Wilbraham, at Tower Square in Metro Center Springfield, and in Indian Orchard.

Hampden County, Massachusetts: Hampden County is a non-governmental county located in the Pioneer Valley of the state of Massachusetts, in the United States.  As of the 2010 census, Hampden County's population was 463,490.  Its traditional county seat is Springfield, the Connecticut River Valley's largest city, and economic and cultural capital.  Hampden County was split from Hampshire County in 1812, because Northampton, Massachusetts, was made Hampshire County's "shire town" in 1794; however, Springfield—theretofore Hampshire County's traditional shire town, dating back to its founding in 1636—grew at a pace far quicker than Northampton and was granted shire town-status over its own, southerly jurisdiction.  It was named for John Hampden.  To the north of Hampden County is modern-day Hampshire County; to the west is Berkshire County; to the east is Worcester County; to the south are Litchfield County, Hartford County, and Tolland County in Connecticut.

Van Ornam &amp; Murdock Block: Van Ornam & Murdock Block, also known as Lee House Block, is a historic commercial block located at Port Henry in Essex County, New York.  The block consists of four attached structures in the Italianate style built between 1874 and about 1880.  It is the focal point of the Port Henry business district.  The Van Ornam Block was built in 1874 and is a 3 ⁄ -story brick building with an ornately bracketed wood cornice.  The 4-story Lee House Hotel was also built in 1874 and is a 4-story brick structure.  The next building was built about 1880 and is a 2-story wood-frame building with a stamped metal facade.  The Harlan building is last on the block and it was also built about 1880.  It is a 2-story, flat-roofed brick structure.

Tolland, Massachusetts: Tolland is a town in Hampden County, Massachusetts, United States.  It is part of the Springfield, Massachusetts Metropolitan Statistical Area.  The population was 485 at the 2010 census, making it the smallest town in Hampden County by population.

Carlton House Block: The Carlton House Block is a historic commercial and retail block at 9-13 Hampden Street in Springfield, Massachusetts.  The six-bay three story brick building was built in 1875 with Italianate detailing.  Its name derives from its site, which was previously the location of the Carlton House Hotel.  It was built for lease to one of the leading shoe and boot wholesale manufacturers in the area; they occupied the premises until 1897, after which it has seen a variety of tenants.  The building was listed on the National Register of Historic Places in 1983.

Warren Opera House Block and Hetherington Block: The Warren Opera House Block and Hetherington Block are historic buildings located in Greenfield, Iowa, United States.  They are both 2½-story brick structures.  The Opera House block, originally owned by E.E. Warren, is located on the corner and features a corner turret.  It housed Warren's dry goods store and a theatre.  The adjacent commercial block was originally owned by John J. Heatherington, and is similar in style to the Opera House block.  Both buildings feature facades with a tripartite arrangement and center frontispieces that project slightly forward, a broad rock-faced beltcourse that runs above the second floor windows, a narrow metal cornice, and a brick parapet with finials.  The Opera House's parapet has a triangular pediment with "Opera House" on a rectangular base, and the Hetherington Block has a similar feature in a simplified form.  The buildings were listed together on the National Register of Historic Places in 1979.  In 2014 they were included as a contributing property in the Greenfield Public Square Historic District.

Patton Building: The Patton Building is a historic commercial office building located at 15-19 Hampden Street in Springfield, Massachusetts.

Springfield, Massachusetts: Springfield is a city in western New England, and the seat of Hampden County, Massachusetts, United States.  Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers: the western Westfield River, the eastern Chicopee River, and the eastern Mill River.  As of the 2010 Census, the city's population was 153,060.  Metropolitan Springfield, as one of two metropolitan areas in Massachusetts (the other being Greater Boston), had a population of 692,942 as of 2010.

Burbach Block: The Burbach Block is a historic commercial and retail block at 1113–1115 Main Street in Springfield, Massachusetts.  Built in 1882, it is one of a series of buildings marking the area's transition from a smaller-scale residential service area to the commercial downtown.  The building was listed on the National Register of Historic Places in 1983.

Hampden, Massachusetts: Hampden is a town in Hampden County, Massachusetts, United States.  The population was 5,139 at the 2010 census.  It is part of the Springfield, Massachusetts Metropolitan Statistical Area.  The namesake of Hampden is John Hampden, an English patriot.

Supporting paragraphs: Carlton House Block Springfield, Massachusetts
Answer: United States