Assisted-living facilities are usually apartment-like dwellings that are one stop before a nursing home that allow seniors to live with relatively more freedom.

WSJ: Nursing-Home Operators Turn to the U.S.

In addition, ancient maps and building catalogues detailing "apartment buildings, private houses, inns, storage facilities, bakeries and even brothels" were used, Mr Frischer said.

BBC: NEWS | Europe | Ancient Rome brought back to life

Aiming to woo highbrow travellers who require more than a week in the destination they're visiting, apartment hotels provide the luxury of a spacious, well-designed apartment with the added benefits of top notch amenities, such as concierge service, daily housekeeping, dining facilities and business and fitness centres.

BBC: Apartment stays get hotel style