How many movies have Jonas Mekas and Ken Jacobs collaborated on?

They have worked on 4 movies together! Their first movie together was For Life, Against the War (1967) while their highest rated movie together was Cinematic Correspondences: Jonas Mekas - J.L. Guerin (2011). They have not worked together since Please Leave a Message: Anthology Film Archives Voicemails Through the Ages (2022).