ARCHITEKTURGESCHICHTE; TOURISMUS + TOURISMUSPOLITIK (WIRTSCHAFTSWISSENSCHAFTEN); TOURISMUSGESCHICHTE + HOTELLERIEGESCHICHTE + GASTRONOMIEGESCHICHTE; HOTELS + HERBERGEN (ARCHITEKTUR); LUZERN, STADT UND WAHLKREIS (KANTON LUZERN); HISTORY OF ARCHITECTURE; TOURIST TRAFFIC + TOURISM POLICY (ECONOMICS); HISTORY OF TOURISM + HISTORY OF HOTEL INDUSTRY + HISTORY OF FOOD SERVICE INDUSTRY; HOTELS + TRAVELLER'S INNS + LODGINGS (ARCHITECTURE); LUCERNE, CITY AND ELECTORAL DISTRICT (CANTON OF LUCERNE)