Faubourg 21 in Brussels, Belgium has a corrected score of 4.3 ± 0.2 (fair evidence, 2 of 4 platforms), ranked 1 of 162 hotels we score in Brussels. Its platform ratings, normalised to 0-5, average 4.7 before correction: Booking.com 4.6, Tripadvisor 4.8. Rooms from about $375 a night (cached, not a live quote).
Faubourg 21 is a five-star hotel set in a former private mansion in the historic upper town of Brussels, in a quiet corner of the royal district. It belongs to The Leading Hotels of the World and offers design-led, air-conditioned rooms with city views. Guests can use a spa with sauna and massage services, a restaurant, room service, and valet or secure parking. Children stay free. The Royal Palace is about eight minutes on foot, the Magritte Museum and Sablon galleries are also within walking distance, and Avenue Louise takes roughly fifteen minutes. It suits travellers wanting a refined, small-scale stay in a prestigious neighbourhood. Rates start at $375 per night, so it is a considerable expense.
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