Act 1 / Sommo Guibilo, Eccellenza!

Whose song is Act 1 / Sommo Guibilo, Eccellenza!?

Artist Album
George Schick - New York Metropolitan Orchestra; Birgit Nilsson,
Giacomo Puccini - Tosca CD 1
Giacomo Puccini
Tosca (New York Metropolitan Orchestra feat. conductor: George S