Vicente LÃ pez y PortaÃ a ( September 19 , 1772 , Valencia , Spain â `` July 22 , 1850 , Madrid , Spain ) was a Spanish painter . Vicente LÃ pez y PortaÃ a ( September 19 , 1772 , Valencia , Spain -- July 22 , 1850 , Madrid , Spain ) was a Spanish painter , considered the best portrait painter of his time .