The first opera I attended was Lohengrin in May 1967 at Convention Hall in Philadelphia. New York's Metropolitan opera performed Lohengrin in a week-long visit to Philadelphia that was part of the company's national tour.
The production was by Wieland Wagner, the composer's grandson, who had died the previous fall. This was to be Wieland Wagner's final production.
I was 13 years old. You never forget your first Lohengrin! Yes, I was a very strange kid.