Question: A. Hall and Sons Terra Cotta produce in its kilns the terra cotta for a bulding that has been a National Historic Landmark since what year?

Context paragraphs:
Grafton Bank: The Grafton Bank is a historic bank building located at 225 E. Main St. in Grafton, Illinois.  The Classical Revival building was constructed in 1913.  The buff brick building features extensive terra cotta ornamentation on its front facade.  A Diocletian window and terra cotta transom bar top the entrance, and terra cotta pilasters stand on either side.  A classical entablature tops the entrance; the entablature includes an architrave, a frieze inscribed with the bank's name, and a dentillated three-section cornice.  A brick parapet wall tops the facade; a stepped parapet recedes from the wall along the sides of the building.  The bank which originally occupied the building closed in the 1930s, and the building has since been used for a variety of other, mainly commercial, purposes.

Terra Cotta Building (Alfred, New York): Terra Cotta Building is a historic office building and display center located at Alfred in Allegany County, New York.  It was built in 1892 by the Celadon Terra Cotta Co and later sold in 1906, to the Ludowici Company of Ohio, which became the Ludowici-Celadon Company.  It is a one-story, 16 ft , 25 ft building built almost entirely of terra cotta bricks, ornamental and roofing tiles manufactured by Celadon.  The building was designed as a sales office for the company, and was considered a "catalog" of their work.  A replica was erected at the 1893 Columbian Exposition in Chicago.  The building was the only remaining structure after a fire broke out on August 29, 1909 and destroyed what was at the time called Ludowici-Celadon Company.

Maryland Hotel: The Maryland Hotel, now known as the Mark Twain Hotel, is a historic hotel in downtown St. Louis, Missouri.  The hotel was built in 1907 and designed by St. Louis architect Albert B. Groves.  The Classical Revival building uses terra cotta decorations extensively; in particular, the second story is covered entirely in terra cotta, and other decorative terra cotta panels feature fruit and flowers.

Terry Hutchens Building: The Terry Hutchens Building is a historic office and apartment building in Huntsville, Alabama.  The seven story structure was originally constructed in 1925 for the Tennessee Valley Bank, with office space rented to other tenants.  In 2002, the upper floors were renovated into condominiums.  The structure is of steel reinforced concrete faced with brick, giving a Gothic Revival appearance.  The ground floor façade has large display windows separated by brick piers, and has a central, arched entry covered in masonry.  The Jefferson Street façade was originally treated the same way, but was modified with a flat wall of thin brick above two storefront entrances.  A decorative band with rowlock course brick and terra cotta panels separate the ground floor from the rest of the building.  Above, the piers divide each bay containing a pair of one-over-one sash windows; on the seventh floor, a green terra cotta frog sits on the sill, between the windows.  Each bay of the cornice is divided by terra cotta decorated with Gothic shapes and medallions on panels of brick.  The building was listed on the National Register of Historic Places in 1980.

Woolworth Building: The Woolworth Building, at 233 Broadway, Manhattan, New York City, designed by architect Cass Gilbert and constructed between 1910 and 1912, is an early US skyscraper.  The original site for the building was purchased by F. W. Woolworth and his real estate agent Edward J. Hogan by April 15, 1910, from the Trenor Luther Park Estate and other owners for $1.65 million.  By January 18, 1911, Woolworth and Hogan had acquired the final site for the project, totaling $4.5 million.  More than a century after its construction, it remains, at 241.4 m , one of the 100 tallest buildings in the United States as well as one of the 30 tallest buildings in New York City.  It has been a National Historic Landmark since 1966, and a New York City landmark since 1983.

Van Allen Building: The Van Allen Building, also known as Van Allen and Company Department Store, is a historic commercial building at Fifth Avenue and South Second Street in Clinton, Iowa.  The four-story building was designed by Louis Sullivan and commissioned by John Delbert Van Allen (October 5, 1850 – December 30, 1928).  Constructed 1912–1914 as a department store, it now has upper floor apartments with ground floor commercial space.  The exterior has brick spandrels and piers over the structural steel skeletal frame.  Terra cotta is used for horizontal accent banding and for three slender, vertical applied mullion medallions on the front facade running through three stories, from ornate corbels at the second-floor level to huge outbursts of vivid green terra cotta foliage in the attic.  There is a very slight cornice.  Black marble facing is used around the glass show windows on the first floor.  The walls are made of long thin bricks in a burnt gray color with a tinge of purple.  Above the ground floor all the windows are framed by a light gray terra cotta.  The tile panels in Dutch blue and white pay tribute to Mr. Van Allen's Dutch heritage of which he was quite proud.  (Mr. Van Allen was accepted for membership in the Holland Society of New York in 1908).  The Van Allen Building was declared a National Historic Landmark in 1976 for its architecture.

A. Hall and Sons Terra Cotta: A. Hall and Sons Terra Cotta was founded in 1846 in Perth Amboy, New Jersey due to Perth Amboy's rich supplies of clay.  It was one of the first successful terra cotta plants in the United States.  Originally, the manufactory produced porcelain and household wares but transitioned to terra cotta items as time progressed.  The company, always located at 59 Buckingham Avenue, changed its name to the Perth Amboy Terra Cotta Company and then to Atlantic Terra Cotta which, as the preeminent terra cotta producer in the United States, went on to produce in its kilns the terra cotta for such notable buildings as the United States Supreme Court, the Philadelphia Museum of Art, and the Woolworth Building.

105 South Washington Street: 105 South Washington Street in Huntsville, Alabama, is a historic commercial building.  It was built in 1931, after the previous building on the site had burned in 1925.  The street level of the two-story brick building has three single-pane windows on either side of a recessed entry.  A row of similar windows runs above the street level, separated by a row of rectangular panels.  Above the storefront level sits a panel of soldier course bricks, with decorative terra cotta floral blocks on the corners.  The same blocks are used on the top corners of the surrounds for five windows above.  The frieze is terra cotta, with a series of narrow flutes above a decorative bed-mould chain.  The cornice features a geometric X-pattern with small dentils on each block.  The terra cotta detailing exhibits Art Deco influence, popular at the time the building was constructed.  The building was listed on the National Register of Historic Places in 1984.

Anthony Wayne School: Anthony Wayne School is a historic former school building located in the Girard Estate neighborhood of Philadelphia, Pennsylvania.  It was designed by Henry deCoursey Richards and built in 1908–1909.  It is a four-story, five bay, reinforced concrete building clad in brick and in the Late Gothic Revival-style.  It features a projecting entrance with terra cotta ornament, a projecting multi-story terra cotta bay, terra cotta decorative panels, and a parapet.  The school was named for United States Army general and statesman Anthony Wayne (1745–1786).

Hotel Seville: The Hotel Seville is a historic hotel building at Vine and Ridge Streets in downtown Harrison, Arkansas.  It is an L-shaped three story wood frame structure, finished in brick and terra cotta veneer with distinctive Spanish Revival (Mission) styling.  Its eastern entry porch is supported by polychrome terra cotta pillars, and portions of the exterior are finished in terra cotta tile with inset geometric patterns.  Built in 1929, the building is one of the most elaborate examples of Spanish Revival architecture in the state.  It was used as a hotel until the mid-1970s, when it was converted to elderly housing.

Supporting paragraphs: A. Hall and Sons Terra Cotta Woolworth Building
Answer: 1966