... We included 26 studies presenting the results of empirical research on loyalty to hotel brands belonging to different hotel types and located in different parts of the world. The subjects of the research were brands of five-star hotels [91,92,95,112]; four-and five-star hotels [93,96,100,102,106,110]; three-and four-star hotels [104]; hotels classified as luxury [89,107,108,114], upscale [90,103,106,108], or middleclass [97,108]; and hotels described as well-known [111] or located in the most popular tourist destinations [94,109]. They belonged to well-known hotel chains such as Marriott [97,105,108,109,111], Hilton [97,108,109,111], Crown Plaza [89], Westin [89], Sheraton [89,95,103,108], InterContinental [89,109], Mercure [108], Holiday Inn [93,108,113], Best Western [93,108,109,113], Radisson Blue [93], Accor [109], Carlson [109], Starwood [109], Sofitel [95,108], Conrad [95], and Hyatt [95,97,103,109]. ...