Painting entitled El Descubrimiento del Amazonas by Oswaldo Guayasam&iacute;n , Museo Guayasam&iacute;n , Quito , Ecuador Indigenous painter Oswaldo Guayasamin ( 1919 199 ) was Ecuadors best known modern artist His former home has been turned into a museum with galleries displaying his paintings and his collections of pre Columbian and colonial art