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The QO in Amsterdam, a luxury hotel with stone and wood finishings and floor-to-ceiling windows which allow for the excellent use of daylight, providing the hotel with 80% of its lighting. In addition, the 1,638 thermal panels on the building’s façade react autonomously to the outside weather conditions (and to the presence of guests) to optimise the insulation and minimize heating needs. Indeed, the entire concept of the QO is based on a sustainable, circular use of resources. The building materials were almost entirely locally sourced: 33% of the concrete used in the building construction was recovered from a demolished skyscraper in Amsterdam. The hotel’s carpets are made of 100% recycled yarn from fishing nets, also sourced locally. The ingredients for the food served in the hotel’s restaurant and its rooftop bar are grown in its own greenhouse or come from local producers; the hotel’s towels are also locally sourced.