van de Velde, HenryEnglishOxford Dictionary of Englishvan de Velde, Henry /ˌvan də ˈvɛldə / ▸ (1863–1957), Belgian architect, designer, and teacher, who pioneered the development of art nouveau design and architecture in Europe; full name Henry Clemens van de Velde. His buildings include the Werkbund Theatre in Cologne (1914).