How many movies have Přemysl Černý and Václav Lohniský collaborated on?

They have worked on 3 movies together! Their first movie together was The Pilgrimage to the Holy Virgin (1961) while their highest rated movie together was If a Thousand Clarinets (1965). They have not worked together since Murder in the Excelsior Hotel (1971). They are most known for their comedy films together.