Question: The structure which faces The Presbytere was declared a National Historic Landmark in what year?

Context paragraphs:
Hinchliffe Stadium: Hinchliffe Stadium ( ) is a 10,000-seat stadium located in Paterson, New Jersey, USA.  The venue was completed in 1932 and sits on a dramatic escarpment above Paterson's National Historic Landmark Great Falls, and surrounded by the city's National Landmark Historic District, the first planned industrial settlement in the nation (chartered 1792).  It is one of only a handful of stadiums surviving nationally that once played host to significant Negro league baseball during America's Jim Crow era.  The stadium was designated a National Historic Landmark in March 2013 and a Paterson Historic Landmark in May 2013.  In December 2014 legislation passed in the United States Congress to in include the stadium in the Great Falls National Landmark District.

Maggie L. Walker National Historic Site: The Maggie L. Walker National Historic Site is a United States National Historic Landmark and a National Historic Site located at 110½ E. Leigh Street on "Quality Row" in the Jackson Ward neighborhood of Richmond, Virginia.  The site was designated a U.S. National Historic Landmark in 1975.  The National Historic Site was established in 1978 to tell the story of the life and work of Maggie L. Walker (1867-1934), the first woman to serve as president of a bank in the United States.  It was built by George W. Boyd, father of physician, Sarah Garland Boyd Jones.  The historic site protects the restored and originally furnished home of Walker.  Tours of the home are offered by National Park Service rangers.

Guthrie Historic District (Guthrie, Oklahoma): The Guthrie Historic District (GHD) is a National Historic Landmark District encompassing the commercial core of Guthrie, Oklahoma, US.  According to its National Historic Landmark Nomination it is roughly bounded by Oklahoma Avenue on the north, Broad Street on the east, Harrison Avenue on the south, and the railroad tracks on the west; it also includes 301 W. Harrison Avenue.  The National Historic Landmarks Program on-line document describes the boundaries as "14th Street, College Avenue, Pine Street and Lincoln Avenue.  One building, the Logan County Courthouse, is at 301 E. Harrison Avenue, outside the main boundaries of the GHD," This article relies on the former source, which is more detailed.  According to the 1998 nomination, the proposed district covered 31 acres .  The nomination included 112 resources, classed as 69 contributing buildings, 38 non-contributing buildings, 1 non-contributing structure and 3 noncontributing objects.  It was declared a National Historic Landmark in 1999 for its historic significance as the first capital of the Oklahoma Territory and of Oklahoma.

List of U.S. National Historic Landmarks by state: The United States National Historic Landmark Program is designed to recognize and honor the nation's cultural and historical heritage.  The program was formally inaugurated with a series of listings on October 9, 1960; as of February 16, 2017, there are 2,596 designated landmarks.  A National Historic Landmark (NHL) is generally a building, district, object, site, or structure, that is officially recognized by the United States government for its national historical significance.  A National Historic Landmark District (NHLD) is a historic district that is recognized as an NHL.  Its geographic area may include contributing properties that are buildings, structures, sites or objects, and it may include non-contributing properties.

Herndon Home: The Herndon Home is a historic house museum and National Historic Landmark at 587 University Place NW, in Atlanta, Georgia.  An elegant Classical Revival mansion with Beaux Arts influences, it was the home of Alonzo Franklin Herndon (1858-1927), a rags-to-riches success story who was born into slavery, but went on to become Atlanta's first black millionaire as founder and head of the Atlanta Life Insurance Company.  The house was designed by his wife Adrienne, and was almost entirely built with African-American labor.  The house was declared a National Historic Landmark in 2000, and had previously been declared a "landmark building exterior" by the city of Atlanta in 1989.

Principia College Historic District: The Principia College Historic District is a National Historic Landmark District encompassing the central portion of the campus of Principia College in Elsah, Illinois.  The campus master plan and eleven of its buildings are an important late design of architect Bernard Maybeck, best known for his influential architecture in the American West.  It was declared a National Historic Landmark in 1993., and was also placed on the National Register of Historic Places that same year.

Jackson Square (New Orleans): Jackson Square is a historic park in the French Quarter of New Orleans, Louisiana.  It was declared a National Historic Landmark in 1960, for its central role in the city's history, and as the site where in 1803 Louisiana was made United States territory pursuant to the Louisiana Purchase.  In 2012 the American Planning Association designated Jackson Square as one of America’s Great Public Spaces.

The Presbytere: The Presbytère is an architecturally important building in the French Quarter of New Orleans, Louisiana.  It stands facing Jackson Square, adjacent to the St. Louis Cathedral.  Built in 1791 as a matching structure for the Cabildo, which flanks the cathedral on the other side, it is one of the nation's best examples of formal colonial Spanish architecture (with many neo-Renaissance elements).  It was designated a National Historic Landmark in 1970, and is now a property of the Louisiana State Museum.

Arrow Rock Historic District: Arrow Rock Historic District is a National Historic Landmark District encompassing the village of Arrow Rock, Missouri and the adjacent Arrow Rock State Historic Site.  The Arrow Rock area was where the historic Santa Fe Trail crossed the Missouri River, and was thus a key stopping point during the settlement of the American West.  The 260 acre historic district was declared a National Historic Landmark in 1963.

San Juan Bautista State Historic Park: San Juan Bautista Plaza Historic District, also known as San Juan Bautista State Historic Park is a historic district in San Juan Bautista, California, United States, that is a National Historic Landmark and a California state historic park.  It includes the Mission San Juan Bautista, the Jose Castro House (another National Historic Landmark), and several other buildings.  It became a State Park in 1933 and was declared a National Historic Landmark in 1970.

Supporting paragraphs: The Presbytere Jackson Square (New Orleans)
Answer: 1960