Did Ruggero Raimondi sing at the Metropolitan opera in Don Carlos?

Depending on various factors including which version, expect in excess of 3 hours.

She was the first African-American to be named a permanent member of Metropolitan Opera Company. Her first performance at the Met being in Verdi's Un ballo in maschera in 1955 - the part of Ulrica

The first African-American to sing WITH the Met, as you ask, was soprano Leontyne Price, who was invited to sing at a "Met Jamboree" fundraiser on April 6, 1953 at the Ritz Theater on Broadway. The...

Marian Anderson.

Marian Anderson