This is based on my original sketch done at the Palau de la Musica in Valencia, in one of the smaller concert halls. ┬áThat’s me with the black hat.

Palau de la Musica Small Hall, pen and ink A3, 16.5 x 11.7"

Palau de la Musica Small Hall, pen and ink A3, 16.5 x 11.7″