#john singer sargent #sargent #american painters #american artists #american art #american impressionism #american impressionists #1870s #19th century #19th-century american art #american paintings #capri #rooftops #rosina ferrara #ferrara #rosina #dancing #dancers #musicians #tambourines #italian scenes #light #luminous #tarantella #italian women #italian woman #plien-air paintings #en plein air #plein air #american pleinairists