An <n>Art Nouveau</n> stained glass door. Photo by <n>Joan Palau</n>.

<n>Hôtel Tassel</n> in Brussels, an <n>Art Nouveau</n> townhouse designed by architect <n>Victor Horta</n>.

<n>St. Laurent</n> wallpaper by <n>de Gournay</n> in a London townhouse.

The Rococo interior of <n>Esterházy Palace</n>, the filming location for <n>Melanie Martinez</n>'s film <n>K-12</n>.

A <n>Hermès</n> perfume advert from <n>Cosmopolitan France</n>, June 1979.

The <n>Great Gallery</n> at the <n>Royal Palace of Venaria</n>, designed by architect <n>Filippo Juvarra</n>.

The interior of the <n>Pavillon Français</n> at the <n>Domaine de Trianon</n> in <n>Versailles</n>.

The ornate <n>German Rococo</n> staircase of <n>Schloss Augustusburg</n>.

A staircase at the <n>Château du Lude</n> in France's Loire Valley. Photo by <n>Corinne Férault</n>.

The <n>Art Deco</n> <n>Los Angeles Jewelry Center</n>, designed by <n>Claud Beelman</n> in 1931.

A photograph taken in Oaxaca, Mexico by <n>Max Nussenbaum</n>.

<n>The Proposition</n>, a painting by <n>Arturo Ricci</n>.

The interior of the <n>Palais de Justice</n> in Brussels, Belgium.

The living room of <n>La Fábrica</n>, a renovated cement factory by architect <n>Ricardo Bofill</n> in Barcelona.

<n>Casa Empordà</n> by <n>Rife Design</n>. Photo by <n>Fernando Alda</n>.

The <n>Art Nouveau</n> interior of <n>Casa Batlló</n> in Barcelona, designed by <n>Antoni Gaudí</n>.

<n>Art Nouveau Style Flower Panels</n>, a digital illustration by <n>Shawn Briggs</n>.

The <n>Bunkeren</n> house in Australia by <n>James Stockwell Architect</n>. Photo by <n>Rory Gardiner</n>.

Details of the <n>Art Nouveau</n> interior at the <n>Louis Vuitton Maison de Famille</n>.

<n>Job</n> (1896), an <n>Art Nouveau</n> poster by <n>Alphonse Mucha</n>.

Interior detail of the <n>Hospital de Sant Pau</n> in Barcelona, built between 1901-1930.

A bathroom at the <n>Al Moudira Hotel</n> in Luxor.

Interior of a <n>19th Century Château</n> with parklands in the style of landscape architect <n>Édouard André</n>.

<n>Saint Andrew</n> (c. 1740–43) by <n>Pompeo Girolamo Batoni</n>.

The <n>Art Nouveau</n> interior of <n>La Fermette Marbeuf</n> in Paris, designed in 1898 by architect <n>Emile Hurtré</n> and ceramicist <n>Jules Wielhorski</n>.

La Fermette Marbeuf – 5 rue Marbeuf, Paris VIIIe

The <n>Théâtre de la reine Marie-Antoinette au Petit Trianon</n>, designed by architect <n>Richard Mique</n> in 1780.

The <n>New Palace</n> in Gujarat, India, designed by <n>Gregson Batley & King</n> in 1942. Photo by <n>Salva López</n>.

<n>The warming kitchen</n> at the <n>Petit Trianon</n>, Versailles, photographed by <n>François Halard</n>.

Photo by <n>James Mortimer</n> for <n>The World of Interiors</n>, February 1992.