Hierarchy classification:

1. top of the aat hierarchies
2. Styles and Periods Facet
3. Styles and Periods (hierarchy name)
4. [styles, periods, and cultures by region]
5. European
6. [modern European styles and movements]
7. [modern European regional styles and movements]
8. [modern Belgian styles and movements]

Additional parents:

1. top of the aat hierarchies
2. Styles and Periods Facet
3. Styles and Periods
4. styles, periods, and cultures by region
5. European
6. modern European styles and movements
7. Art Nouveau

Anotations

Scope note:

A Belgian variation of Art Nouveau named after the avant-garde group "Les XX" or "Les Vingt," who were organized by lawyer Octave Maus and first exhibited in Brussels in 1884. The term is often used in conjunction with "La Libre Esthéthique," as this group became the successor to Les XX after they were disbanded in 1893.