The image showcases an exquisite architectural element executed in Art Nouveau style with Neo-Gothic influences. This is a decorative rose window with a characteristic round central opening framed by a light stone ring.
The composition of this façade element is symmetrically structured: the central circular opening is surrounded by a soft greenish stone frame with elegant decorative volutes in the upper part. Particularly noteworthy is the use of bright blue tiles (azulejos) arranged in several segments around the main opening. The upper part is adorned with a semicircular segment of blue tiles featuring a subtle marble-like pattern, while the side parts are similarly decorated with matching elements.
The lower part of the composition features a rectangular section filled with a geometric ornament of blue and white tiles with a repeating pattern. The composition is completed by a shield-shaped element bearing the initial "S" executed in a graceful, flowing manner characteristic of Art Nouveau. This monogram likely indicates the building's owner or its architect.
The entire window treatment demonstrates meticulous attention to detail and a high level of craftsmanship, which was typical of early 20th century architecture when decorative elements played a crucial role in creating a building's unique identity.