Following WW II, Bert Haanstra was among the most distinguished and original Dutch documentary directors. Between 1950 and 1970, he won over 50 awards for his work. His short documentary Glass alone won some 20 awards. Haanstra had been interested in filmmaking since boyhood, but got his start as a painter and then newspaper photographer. He didn't direct his first professional film until he was 33, making his second film Mirror of Holland in 1950 and winning the grand prize for documentaries at Cannes that year. Though Haanstra also dabbled in feature films, they were as acclaimed or successful.