His understanding of the possibilities of painting was evolving rapidly; from studying Hals he learned to portray the freshness of a visual impression, while the works of Paolo Veronese and Eugène Delacroix taught him that colour can express something by itself. This led to his enthusiasm for Peter Paul Rubens and inspired his sudden departure for Antwerp, Belgium, where the greatest number of Rubens’s works could be seen. The revelation of Rubens’s mode of direct notation and of his ability to express a mood by a combination of colours proved decisive in the development of van Gogh’s style. Simultaneously, van Gogh discovered Japanese prints and Impressionist painting. All these sources influenced him more than the academic principles taught at the Antwerp Academy, where he was enrolled. His refusal to follow the academy’s dictates led to disputes, and after three months he left precipitately in 1886 to join Theo in Paris. There, still concerned with improving his drawing, van Gogh met Henri de Toulouse-Lautrec, Paul Gauguin, and others who were to play historic roles in modern art. They opened his eyes to the latest developments in French painting. At the same time, Theo introduced him to Camille Pissarro, Georges Seurat, and other artists of the Impressionist group.
In November 1959, Van Dyke made his Broadway debut in The Girls Against the Boys. He then played the lead role of Albert Peterson in Bye Bye Birdie, which ran from April 14, 1960, to October 7, 1961. In a May 2011 interview with Rachael Ray, Van Dyke said that when he auditioned for a smaller part in the show he had no experience as a dancer, and that after he sang his audition song he did an impromptu soft-shoe out of sheer nervousness. Gower Champion, the show's director and choreographer, was watching, and promptly went up on stage to inform Van Dyke he had the lead. An astonished Van Dyke protested that he could not dance, to which Champion replied: "We'll teach you". That musical won four Tony awards including Van Dyke's Best Featured Actor Tony, in 1961. In 1980, Van Dyke appeared as the title role in the first Broadway revival of The Music Man.