The Fabulous Baron Munchausen (Czech: Baron Prášil) is a 1962 Czechoslovak romantic adventure film directed by Karel Zeman, based on the tales about Baron Munchausen. The film combines live-action with various forms of animation and is highly stylized, often evoking the engravings of Gustave Doré.
https://en.wikipedia.org/wiki/The_Fabulous_Baron_Munchausen
Seen it and it’s hilarious. Karel Zeman (no relation to the alcoholic ex-president Miloš Zeman) was a master of practical effects.