The court commissioned an international group of experts to address the authenticity of Van Meegeren's paintings. The commission included curators, professors, and doctors from the Netherlands, Belgium, and England, and was led by the director of the chemical laboratory at the Royal Museums of Fine Arts of Belgium, Paul B. Coremans. The commission examined the eight Vermeer and Frans Hals paintings which Van Meegeren had identified as forgeries. With the help of the commission, Dr Coremans was able to determine the chemical composition of van Meegeren's paints.