With the apparent approval of the king, ha-Levi defied the laws that required synagogues to be smaller and lower than churches, and plain of decoration. The building features Nasrid-style polychrome stucco-work, Hebrew inscriptions praising the king and ha-Levi himself, and quotations from the Psalms, as well as multifoil arches and a massive Mudéjar artesonado ceiling. Arabic inscriptions are intertwined with the floral patterns in the stucco.