Grade I listed buildings in Lancashire  This is a list of Grade I listed buildings in Lancashire, England. In the United Kingdom, the term "listed building" refers to a building or other structure officially designated as being of special architectural, historical or cultural significance. These buildings are in three grades: Grade I consists of buildings of outstanding architectural or historical interest. Buildings in England are listed by the Secretary of State for Culture, Media and Sport on recommendations provided by English Heritage, which also determines the grading. Note: The Heritage Gateway website is published by the Heritage Gateway Partners, namely English Heritage, the Institute of Historic Building Conservation, and The Association of Local Government Archaeological Officers (ALGAO:England)