Continuum is a public library for the neighborhood of Back Bay Fence, in Boston. The building had to reconcile a public program of open access stacks, a café, and an amphitheater while ensuring enough privacy for private archives and regulated access.

The edifice sits on the river, one foot in the city, one in Back Bay Park. The unicity of the program is achieved through a ring-like scheme composed of three overlapping circles, the outer ring hosting the public program and the most-inner one regrouping the archives.

Each circle is made out of a sequence of frames, with varying gaps in between, inducing changing gradients of privacy: wide gaps towards the park, offering a porous façade, allowing for dense light and views for the café and the public stacks; thin openings towards the city, to shelter the private archives and working rooms, while bringing in a filtered light.