In 2017, the Hague's City Hall was painted in primary colours to celebrate which Dutch artist?

Pieter Cornelis Mondriaan, after 1906 Piet Mondrian (7 March 1872 – 1 February 1944), was a Dutch painter and theoretician who is regarded as one of the greatest artists of the 20th century.

After a meeting with Van der Leck in 1916, Mondrian wrote, "My technique which was more or less Cubist, and therefore more or less pictorial, came under the influence of his precise method." With Van Doesburg, Mondrian founded De Stijl (The Style), a journal of the De Stijl Group, in which he first published essays defining his theory, which he called neoplasticism.

De Stijl was a Dutch art movement founded in 1917 in Leiden. De Stijl consisted of artists and architects. In a narrower sense, the term De Stijl is used to refer to a body of work from 1917 to 1931 founded in the Netherlands.

In 2017, the Hague City Council honored Mondrian by adorning walls of City Hall with reproductions of his works and describing it as "the largest Mondrian painting in the world." The event celebrated the 100th year of the Stijl movement which Mondrian helped to found.