Named after nearby Marble Arch, this 82-bedroom townhouse hotel was built inside seven Grade II-listed Georgian buildings and a pair of mews houses in Great Cumberland Place.
The conversion is so discreet The Arch is something of a hidden gem, while its interiors, the work of leading style specialist RDD Interior Design, elegantly fuse the quintessentially English architecture with a contemporary European look. This is a place where past meets present very comfortably.
Every room in the hotel seems to be inspired by local landmarks and streets: Hyde Park is just around the corner and Madonna's lovely house is among the close neighbours.
Non-residents can pop in for a drink in the sumptuous Martini Library and admire its eclectic mix of furniture but you'll need to spend a night in one of The Arch's beautiful bedrooms to fully appreciate the hotel's fashionable yet warm details.
Similarly colourful design concepts could also add character to your own home — with lots of items available on the high street to help make the look achievable. Focus on one room at a time, pick your pieces with care and add instant panache to your property.
The Martini Library
Contrast the colours
The Martini Library was designed to evoke timeless glamour. It is a fusion of patterns, textures and colours. At the centre of the room is the coffee table. The Natuzzi Cabaret is similarly stylish to the version The Arch has chosen (£740; natuzzi.co.uk). Juxtapose its monochrome look with Dunelm Mill's red Oriental rug (£99.99 to £189.99; dunelm-mill.com). Bright and busy, it works well with hard wood or laminate flooring.
Pick a patterned sofa and work the other seating around it. The Eva Fabric Snuggler in navy stripe from Tesco (£450; tesco.com) is ideal for small living spaces. Or go for Next's Edmonton in Tara fabric with a light teal finish (£599; next.co.uk).
Alternatively, have a sofa custom made with Wicklow fabric (£70 a metre; fabricsandpapers.com). Team it with a neutral armchair such as the John Lewis Lola in Panaro/Celadon with flared arms (£999, johnlewis.com) and a leather two-seater — try the tan-coloured Paris from Dwell (£995, dwell.co.uk). Mix and match the shades with Flock Damask cushion covers (£9.96 a pair, tesco.com) or opulent jewel coloured cushions (£40 each, sorella online.co.uk).
The sitting room
Work the walls
The Arch's lounge and study area has wonderful Georgina Horton Quilt wallpaper from The One Collection (£107 a roll; fabricsandpapers.com). "I thought it would be fun for people to have a wall of feathers," says Horton. "You could stroke them in your mind as you followed them down the wall. I have lots of dreams about flying."
If you are on a budget, Graham Brown's Flourish wallpaper will create a similar effect with largescale floral blooms with fine metallic linear detail, for only £20 a roll (grahambrown.co.uk).
Tie aspects of the room together by framing a piece of your chosen wallpaper on a plain white wall. Play.com's Black Poster Wood Frame — a snip at £12.49 — should do the job.
Then hang bold artwork that adds a splash of vibrancy. Linda Culverwell's liquid gloss paintings can be commissioned for £2,500 to £3,000 (lindaculverwell.com).
A more budget-friendly option might be Easy Art's Circles of Colour Azure print at £30.59 (easyart.com).
Go for a sofa as comfortable as it is stylish. The elephant-coloured matt velvet Leon (£1,270) from sofa.com is a soft and luxurious throwback to the Thirties. Then play with the shapes in the room using accessories.
Phillips & Wood's Melrose table lamp makes an impression with a curved cast brass base (£856.80; phillipsandwood.co.uk). Or Laurence Llewelyn-Bowen's Mercury glass table lamp (£55; isme.com) is a less expensive option.
Make a statement
Works by emerging British artists punctuate the formal spaces at The Arch. As soon as guests arrive they are met by New Shoes, a striking two-metre brightly coloured silhouette of a woman — an instillation by artist Vincent Poole made up of images from the local area including Marylebone High Street, Bond Street, Harley Street and Selfridges (£1,500, vincentpoole.co.uk).
Martha Winter's Blue Void Ring IV wall sculpture is wonderfully bold. Buy similar pieces by Winter from galleryrouge.com. If you are budgeting, combine high-end with high street and do your colour blocking with the red leather-effect Stanza sofa from Tesco (£198; tesco.com).
Bringing outdoors in
The guestrooms at The Arch incorporate rich textiles, crisp linens and sumptuous furnishings. Colour schemes, such as the greens and browns in the Hyde Park-inspired room (pictured), reflect the features of the local neighbourhood. You too can bring the outdoors indoors by using nature prints on the walls.
Palladio Sunflower Wallpaper Cosy comforts: (£44 a roll; fabricsandpapers.com) in aubergine on a gold background breathes joy into a space. Also visit lynseyjeanhenderson.blogspot.co.uk to browse through a great selection of handmade designs.
The Arch has livened up the bed with a lambswool Mondo Gold Melin Tregwynt throw (£125; melintregwynt.co.uk or johnlewis.com).
Stemming from traditional Welsh designs, the blankets are made in a whitewashed mill in a remote wooded valley on the Pembrokeshire coast.
For great value cushions bag the TJ Hughes chenille circle range (£8.99; tjhughes.co.uk) or Very's velvet leaf pattern (£13; very.co.uk). They make a good match for Next's Amelia trailing green leaf chair (£225 to £350; next.co.uk).
Even the distinctive flower-patterned tea sets (from £22; burleigh.co.uk) at The Arch continue the theme.
Go for the tree trunk-coloured Linosa bonded leather headboard from Debenhams (£129 to £219; debenhams.com) to add a finishing touch.
Dazzle with decor
* Finish the makeover with the right wall and ceiling essentials: The black-and-gold pendant ceiling stringed light shade from Haysom Interiors is a must at £42 (haysominteriors.co.uk).
* Seek out your own prints: Artists Caroline Yates, Peter Defty and Marcus James have created pieces for The Library, capturing beauty and romance. Find your own prints from websites such Zazzle.co.uk.
* Splash out on a standout item: such as the Fiam Gallery Circle Glass Frame Mirror (£1,155.98, allmodern.co.uk).
* For more homes and interiors features by Amira Hashish, visit homeshotspot.com