Question: What was the name of the architect who designed the building whose grounds Hancock Manor would now stand on?

Context paragraphs:
Mystic Bridge Historic District: The Mystic Bridge Historic District (also known as Lower Mystic or Mistick) is a historic district on U.S. 1 and CT 27 in the Stonington side of the village of Mystic, Connecticut.  The district represents the core of the early settlement of that name on the east bank of the Mystic River.  It extends from Washington Street in the south to the Mystic Seaport Museum in the north (whose grounds and floating vessels are included in the district), and from the river (where it includes the 1924 lift bridge) in the west to Denison and Greenmanville Avenues (Connecticut Route 27) on the east.  The district is significant as a well-preserved shipbuilding and maritime village of the 19th and early 20th centuries.

Osthaus-Museum Hagen: The Karl Ernst Osthaus-Museum is an art museum in Hagen, North Rhine-Westphalia, Germany.  The center of the museum is a building whose interior was designed by Henry van de Velde to house Karl Ernst Osthaus' art collection, open to the public as the Folkwang Museum.  When Osthaus' heirs sold his art collection to the city of Essen, the city of Hagen gained possession of the empty museum building.  For a time it served as offices for the local electric company.

List of cricket grounds in England and Wales: This is a list of cricket grounds in England and Wales, listed in alphabetical order and based on each traditional English and Welsh county.  The venues in this list have all been used for important matches "before" the foundation of the current first-class county or university clubs, whose grounds are listed in each club's own article as indicated below (e.g., The Oval is in List of Surrey County Cricket Club grounds).  The venues have staged important (pre-1895), first-class (from 1895), single wicket, limited overs or Twenty20 matches.  Venues used only for junior or minor matches are excluded unless they have a special historic interest.  Some of the venues are dated to the 17th and 18th centuries and many are now defunct (marked by †).

Pike–Fletcher–Terry House: The Pike–Fletcher–Terry House, also known as just the Terry Mansion and now the Community Gallery at the Terry House, is a historic house at 8th and Rock Streets in central Little Rock, Arkansas.  It is a large two story Greek Revival building, whose grounds occupy the western end of a city block bounded by Rock, 8th, and 7th Streets.  Its most prominent feature is its north-facing six-column Greek temple portico.  The house was built in 1840 for Albert Pike, a leading figure in Arkansas' territorial and early state history.  It has also been home to John Fletcher, a prominent Little Rock businessman and American Civil War veteran, and David D. Terry, Fletcher's son-in-law and also a prominent Arkansas politician.  The house is now owned by the Arkansas Arts Center, which uses it has an art gallery and event space.

Hancock Manor: The Hancock Manor was a house located at 30 Beacon Street on Beacon Hill, Boston, Massachusetts.  It stood near the southwest corner of what are today the grounds of the Massachusetts State House.

Massachusetts State House: The Massachusetts State House, also known as the Massachusetts Statehouse or the New State House, is the state capitol and seat of government for the Commonwealth of Massachusetts, located in the Beacon Hill/Downtown neighborhood of Boston.  The building houses the Massachusetts General Court (state legislature) and the offices of the Governor of Massachusetts.  The building, designed by noted architect Charles Bulfinch, was completed in January 1798 at a cost of $133,333 (more than five times the budget), and has repeatedly been enlarged since.  It is considered a masterpiece of Federal architecture and among Bulfinch's finest works, and was designated a National Historic Landmark for its architectural significance.

Farmers and Merchants Bank (Nampa, Idaho): The Farmers and Merchants Bank, now the Nampa Public Library, at 101 11th Ave., S., in Nampa, Idaho is an Idaho bank building whose construction began in 1919.  It was designed by Idaho's most notable architects Tourtellotte & Hummel in Classical Revival style that suggests solidity.  It is a 60 ft by 90 ft two-story building with a portico consisting of a pediment supported by two pairs of Ionic columns.  The pediment's tympanum contains an eagle sculpture.  Within the portico, above the front door of the bank, is "Nampa Public Library" in block letters and a smaller pediment is sculpted and includes insignia of the First National Bank.

Hancock House (Ticonderoga, New York): The Hancock House is an historic structure in Ticonderoga, New York.  It is a replica of the Hancock Manor on Boston's Beacon Hill that was the residence of Thomas Hancock, the uncle of John Hancock.

Belle Meade Plantation: Belle Meade Plantation, located in Belle Meade, Tennessee, is a historic mansion whose grounds now function as a museum.  Belle Meade Plantation consists of 30 remaining acres and includes a winery, visitor's center, original outbuildings including the Harding cabin, dairy, carriage house, stable, mausoleum and a reconstructed slave quarters.

Palmer School: The Palmer School, also known as the District No. 2 Schoolhouse, is a historic 19th-century one-room schoolhouse at 33 Main Street in Boxford, Massachusetts.  Built in 1845, it is the town's last surviving 19th-century school building.  It was used as a school until 1931, replaced by the Cole School, on whose grounds it stands.  The building was listed on the National Register of Historic Places in 1998.

Supporting paragraphs: Hancock Manor Massachusetts State House
Answer: Charles Bulfinch