Conversation so far:
Did Piet Mondrian paint at all in the Netherlands?
After a strict Protestant upbringing, in 1892, Mondrian entered the Academy for Fine Art in Amsterdam. He began his career as a teacher in primary education; he also practiced painting.
Are there any other interesting aspects about Mondrian's time in the Netherlands besides practicing painting there?
While Mondrian was visiting the Netherlands in 1914, World War I began, forcing him to remain there for the duration of the conflict.
Did Mondrian have any influences?
Piet Mondrian stayed at the Laren artists' colony, where he met Bart van der Leck and Theo van Doesburg, who were both undergoing their own personal journeys toward abstraction.

Question: Did he collaborate with Doesburg?
Self-contained rewrite: Did Mondrian collaborate with Doesburg?