Dissection of the vault of the Baptistery, Florence Cathedral, figure 6 from "Character of Renaissance Architecture" From the reentrant angles of the octagon {a, Fig. 6) solid abutments are built up against the salient angles of the vault, and, between these, two secondary abutments ("b") are carried up against each of its sides.}} |date=1905 |source=Character of Renaissance Architecture |author=creator:Charles Herbert Moore |permission=1930 |other_versions=page=41 |other fields =