Most French fashion luxury brands have their main store in 8th arrondissement, Avenue Montaigne or Rue du Faubourg Saint-Honoré, both in the Champs-Élysées Avenue shopping district.
Source: Wikipedia
Paris in 20 Walks: 8th Arrondissement
Start/ End: Monceau metro / Saint Augustin metro
Part 1- Start to Champs-Elysees Clemenceau metro [nos. 1-22] - 4.6 km
Part 2 - Champs-Elysees Clemenceau metro to End [nos. 23-41] - 4.2 km
Best streets & passages
Avenue des Champs Elysées [no. 9]
Arcades des Champs Elysees [no. 12]
George V [no. 14]
Avenue Montaigne [no. 18]
Port des Champs Elysées [no. 27]
Rue du Faubourg Saint-Honore [no. 33]
Le Village Royal [no. 36]
Galerie de la Madelaine [no. 37]
Passage Puteaux [no. 40]
Gardens
Parc Monceau [no. 1]
Jardin de l'hôtel Salomon de Rothschild [no. 7]
Jardin de la Nouvelle France [no. 21]
Square de Berlin [no. 22]
Jardin des Champs-Elysées [no. 31]
Museums/ Theatres etc
Musee Cernuschi (Museum of Asian Art) [no. 2]
Musee Nissim de Camondo [no. 3]
Pagoda of Paris [no. 4]
Musee Jacquemart-Andre [no. 5]
Crazy Horse [no. 16]
Grand Palais [no. 23]
Petit Palais (Musee des Beaux-Arts) [no. 24]
Hotel de la Marine [no. 29]
Churches
American Cathedral [no. 15]
Notre-Dame-de-Consolation [no. 19]
Armenian Cathedral [no. 20]
L'eglise de la Madelaine [no. 38]
Chapelle Expiatoire (and Square Louis XVI) [no. 41]
Other Landmarks
Arc de Triomphe [no. 8]
Pont de l'Alma [no. 17]
Pont Alexandre III [no. 26]
Place de la Concorde (& the Luxor Obelisk) [no. 28]
Elysee Palace (Hotel d'Evreux) [no. 34]
Cafes/Restaurants
Cafe Jacquemart-Andre [no. 6]
Fouquet's [no. 10]
Laduree [no. 11 & 35]
Cafe du Petit Palais [no. 25]
Maxim's [no. 30]
Markets/shops
Galeries Layfayette [no. 13]
Marche aux Timbres [no. 32]
Marche Aguesseau [no. 39]