The Sound of Music : Wedding processional

Wedding processional

In the film ,was it a real church/ cathedral used for the wedding scene or just another very elaborately created Soundstage? It had the all appearances of a "royal" procession ( aerial shot of Maria slowly progressing up the aisle) Anybody provide an answer??

Re: Wedding processional

Maria's wedding was filmed at the Basilica St. Michael in Mondsee, Austria.