What is National Historic Landmark?
[[File:USS Constitution 1997.jpg|thumb|[[USS Constitution|USS ''Constitution'']]]] [[File:Taliesin-aerial-600.jpg|thumb|[[Frank Lloyd Wright]]'s [[Taliesin (studio)|Taliesin]] is a National Historic Landmark]] [[File:American-legation-tangier-1.jpg|thumb|The [[American Legation, Tangier|American Legation in Tangiers, Morocco]], is the only National Historic Landmark on foreign soil.]] [[File:Navajo Nation Council Chambers 6809.jpg|thumb|[[Navajo Nation Council Chamber]], the seat of government for the [[Navajo Nation]], [[Window Rock, Arizona]].]] [[File:Mohonk Mountain House 2011 View of Mohonk Guest Rooms from One Hiking Trail FRD 3205.jpg|thumb|[[Mohonk Mountain House]], a resort hotel on [[Shawangunk Ridge]]; site of 1895-1916 conference that led to establishment of [[Permanent Court of Arbitration]] at [[The Hague]]]] [[File:Dealeyplazaplaque.jpg|thumb|National Historic Landmark [[Commemorative plaque|plaque]] at [[Dealey Plaza]], [[Dallas]] [[Texas]].]] A '''National Historic Landmark''' ('''NHL''') is a [[building]], [[wiktionary:site|site]], [[structure]], [[Object (National Register of Historic Places)|object]], or [[district]] with historical importance. The [[Federal government of the United States|United States government]] marks them as NHLs only if they have high historical significance. Out of more than 80,000 places on the [[National Register of Historic Places]] only about 2,430 are NHLs. A '''National Historic Landmark District''' ('''NHLD''') is a [[Historic district (United States)|historic district]] that is recognized as an NHL. It may include [[contributing properties]] that have buildings, structures, sites or objects, and it may include non-contributing properties. ==History== On October 9, 1960, Secretary of the Interior [[Fred Andrew Seaton]] announced 92 properties as NHLs. The first of these was a political nomination, [[Sergeant Floyd Grave and Monument]] in [[Sioux City, Iowa]] as officially designated on June 30 of that year, but for various reasons the public announcement of