Lower Part of the Choir, Siena Cathedral

Walter Shirlaw's architectural study captures the interior of Siena's cathedral choir with loose, economical brushwork characteristic of late 19th-century European plein air practice. The sketch emphasizes spatial recession and light effects rather than precise detail, with figures rendered as staffage to convey scale. Shirlaw, a Scottish-born American painter, executed such studies during travels abroad, working from direct observation to explore compositional structure and atmospheric effects. The fluid handling and rapid notation technique reflect the influence of European academic tradition on American studio practice during this period.