A National Historic Landmark is a building, object, site, or structure, recognized by the United States government for its outstanding historical significance. Only some 2,500 of over 90,000 places listed on the country's National Register of Historic Places are recognized as National Historic Landmarks. A National Historic Landmark District may include contributing properties that are buildings, sites or objects, it may include non-contributing properties. Contributing properties may or may not be separately listed. Prior to 1935, efforts to preserve cultural heritage of national importance were made by piecemeal efforts of the United States Congress. In 1935, Congress passed the Historic Sites Act, which authorized the Interior Secretary authority to formally record and organize historic properties, to designate properties as having "national historical significance", gave the National Park Service authority to administer significant federally owned properties. Over the following decades, surveys such as the Historic American Buildings Survey amassed information about culturally and architecturally significant properties in a program known as the Historic Sites Survey.
Most of the designations made under this legislation became National Historic Sites, although the first designation, made December 20, 1935, was for a National Memorial, the Gateway Arch National Park in St. Louis, Missouri; the first National Historic Site designation was made for the Salem Maritime National Historic Site on March 17, 1938. In 1960, the National Park Service took on the administration of the survey data gathered under this legislation, the National Historic Landmark program began to take more formal shape; when the National Register of Historic Places was established in 1966, the National Historic Landmark program was encompassed within it, rules and procedures for inclusion and designation were formalized. Because listings triggered local preservation laws, legislation in 1980 amended the listing procedures to require owner agreement to the designations. On October 9, 1960, 92 properties were announced as designated NHLs by Secretary of the Interior Fred A. Seaton; the first of these was a political nomination: the Sergeant Floyd Monument in Sioux City, Iowa was designated on June 30 of that year, but for various reasons, the public announcement of the first several NHLs was delayed.
NHLs are designated by the United States Secretary of the Interior because they are: Sites where events of national historical significance occurred. More than 2,500 NHLs have been designated. Most, but not all, are in the United States. There are the District of Columbia. Three states account for nearly 25 percent of the nation's NHLs. Three cities within these states all separately have more NHLs than 40 of the 50 states. In fact, New York City alone has more NHLs than all but five states: Virginia, Pennsylvania and New York. There are 74 NHLs in the District of Columbia; some NHLs are in U. S. commonwealths and territories, associated states, foreign states. There are 15 in Puerto Rico, the Virgin Islands, other U. S. territories. S.-associated states such as Micronesia. Over 100 ships or shipwrecks have been designated as NHLs. About half of the National Historic Landmarks are owned; the National Historic Landmarks Program relies on suggestions for new designations from the National Park Service, which assists in maintaining the landmarks.
A friends' group of owners and managers, the National Historic Landmark Stewards Association, works to preserve and promote National Historic Landmarks. If not listed on the National Register of Historic Places, an NHL is automatically added to the Register upon designation. About three percent of Register listings are NHLs. American Water Landmark List of U. S. National Historic Landmarks by state List of churches that are National Historic Landmarks in the United States Listed building, a similar designation in the UK National Historic Sites and Persons, similar designations in Canada National Natural Landmark United States Memorials United States National Register of Historic Places listings Official National Historic Landmarks Program website A History of the NHL Program List of National Historic Landmarks National Historic Landmarks: Archaeological Properties Historical Landmarks - United States Lighthouses
The Canal de Televisión del Congreso de los Estados Unidos Mexicanos, shortened to Canal del Congreso, is a television channel in Mexico that broadcasts the sessions of both houses of the Congress of the Union. It is available on all Mexican cable and satellite systems, as well as over-the-air in Mexico City on digital television station XHHCU-TDT channel 45. Created in 1998 under the LVII Legislature of the Mexican Congress, the Canal del Congreso broadcasts its congressional programming as well as other politically-oriented programs, it has studio facilities in both the Chamber of Deputies and the Senate, it is governed by a bicameral commission. In 2000, it began full-time transmissions on cable systems, expanding to satellite in 2001. At the beginning of the LVIII Legislature of the Mexican Congress, the Bicameral Commission worked to achieve a milestone for the channel: the Comisión Federal de Telecomunicaciones the television regulator in the country, required all cable systems to carry it.
On March 10, 2010, Cofetel awarded it a concession to start XHHCU-TDT, a digital-only station broadcasting from Cerro del Chiquihuite, to carry the Canal del Congreso signal over the air in Mexico City. Channel 45 went on air on June 24, 2010. In 2013, the channel's director general, Leticia Salas Torres, stated that she wishes to expand Canal del Congreso's over-the-air reach outside Mexico City; the first step in this process was Canal del Congreso's addition to ten transmitters of the Sistema Público de Radiodifusión del Estado Mexicano in 2016. The SPR transmitters that carry Canal del Congreso use PSIP to display it on television receivers as channel 45.1. Official website Bicameral Commission home page
La Brava is a lake in the eastearn part of the Balcarce Partido in Buenos Aires Province, Argentina. It lies just on the border with General Pueyrredón, 40 kilometres northwest of the city of Mar del Plata and 25 kilometres east of the town of Balcarce. Located within Mount La Brava, the lake area is owned, although open to the public for fishing and camping. There are several campsites around the lake, like Ruca Lauquen on the east coast and the Fishing Club Balcarce on the north, both of them with recreational facilities and boat piers; the lake is described as a rift lake or tectonic lake a natural reservoir formed by dunes. La Brava is the habitat of a number of bird species, like swans, coots and gulls. Capybaras and otters dwell in its shores; the lake support a fish community dominated by the silverside and the dentudo. The landscape has been compared with that of the lakes of western Patagonia. Laguna de los Padres Sierra de los Padres