I think more of the foundation of Marienbad - and Hiroshima for that matter - is in Night and Fog (1955), where this is 1956. So perhaps the debt is the other way around...? Or nonexistent...? Either way, two superb filmmakers.
Cool site and nice way of allowing folks to interact with the film! I'll be checking it out and waiting to see a trailer for it, with the chance to viewing it one day. Good luck and congrats on making it this far!