found:Art & architecture thesaurus online, Aug. 12, 2022(Built Complexes and Districts (hierarchy name) BT Built Environment (hierarchy name). The Built Complexes and Districts hierarchy contains terms for coherent groupings of built works and for parts of settlements. Complexes are defined as aggregations of buildings, other structures, and open spaces, often multifunctional and more extensive, and usually shaped over a longer period of time by more participants than single built works. Districts are defined as delineated or perceived components of settlements that are more extensive and less architectonic than built complexes; Single Built Works (hierarchy name) BT Built Environment (hierarchy name). The Single Built Works hierarchy contains terms for freestanding buildings and other structures commonly considered individual built works or architectural types (e.g., "museums," "basilicas," "palaces"). Terms for single built works cover a range from complex buildings to minimal accessory structures (e.g., "apartment houses," "cow sheds," "arbors"). Also included are constructions providing no enclosure or shelter (e.g., "signal towers"). Some structures may be relatively small and exist as accessories to other built works (e.g., "fountains," "tombs"))