Janella do Zimborio

'Janella do Zimborio' (Window of the Dome), painted by Sercelli in 1900, documents a specific architectural detail of the Ipiranga Monument in São Paulo—the circular window (oculus) of the dome that is now the Ipiranga Museum itself. Sercelli was painting the building that would eventually house his works, a reflexive circumstance that gives the image documentary and institutional significance. The 'janella' (window) as subject allowed him to study the interplay of interior and exterior light through an architectural aperture. The Ipiranga Museum holds the work.

The composition focuses on the architectural detail of the circular window and its surrounding structure, with light entering through the aperture creating strong contrast between the illuminated glass and the surrounding masonry. Sercelli balances architectural precision with sensitivity to the quality of the transmitted light.