The Confluence Dome is a proposed civic landmark in San Jose, California, designed as a freestanding, open-air, eight-lobed (octofoil) dome. The project reinterprets the historical archetype of the dome as a communal and social sanctuary, completely detaching it from any institutional base to function as a seamless blend of architecture, public park, and civic sculpture.

Structurally, the building bypasses traditional pendentives or squinches in favor of an innovative octofoil geometry that supports the dome's shell using eight perimeter cores. This advanced structural system leaves the outer perimeter completely open and frees up the vast interior volume across four distinct public levels.

The public journey begins at the lowest level, called the Under Dome, which is organized beneath the four sloped faces of a central, grassy pyramid housing a ticket booth, café, gift shop, gallery, and public restrooms.

Visitors can climb the face of this green interior landscape to reach the Belvedere, an idyllic observation platform 30 feet above the ground at the very center of the dome. For higher vantage points, elevators transport guests to the Procession Level at 100 feet, where the final 26.5-foot ascent to the summit unfolds along a gently sloping helical ramp. As visitors climb this winding pathway through the dome's inner mass, they pass through four structural portals that offer framed outlooks of the landscape below before arriving at the Sky View level. Situated 126.5 feet above the ground, this grand observation deck pairs panoramic city views with a dramatic, 47-foot-diameter open oculus that frames the California sky.

A custom shingle cladding skin inverts the historical interior fesco as an exterior ‘plummage’ of color that incorporates patina, color graidents, and solar shingles.