Andrea Palladio · The First Book
Chapter XXIV. Of the several manners of vaults
THERE are six manners of vaults, viz. cross’d, fasciated, flat (so they call vaults which are a portion of a circle, and do not arrive to a semicircle) circular, groined, and shell-like; all which are a third part of the breadth of the room in height.
The two last manners have been invented by the moderns, but the four first were used by the antients.
The circular vaults are made in square rooms, and the manner of making them is thus: In the angles of the room are left some mutules that support the semicircle of the vault, which in the middle is flat, but more circular the nearer it comes to the angles.
There is one of this kind in the baths of Titus at Rome, which was partly ruin’d when I saw it,
1 I HAVE I Have here put under the forms of all these different manners, applied to the different shapes of the rooms.
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Public-domain text (London, published by Isaac Ware, 1738). Read from the Internet Archive’s scan (gri_33125011569684) of the copy in the Getty Research Institute, by way of Wikimedia Commons, where it is marked public domain. That scan’s text layer had lost the ends of the lines on every left-hand page, so the pages were read again from the scan’s images, the two readings compared word by word, and the text cleaned: the long s (ſ) is printed s and the ct and st ligatures as plain letters, words broken at the ends of lines are joined, and running heads, page numbers, signatures and catchwords are removed. Ware’s spelling, capitals and punctuation are otherwise kept (shew, publick, antient, compleat). Chapter titles and words the OCR misread were corrected against the page images. Some misreadings will remain, most of them in the italic prefaces and the Latin of Book III. Ware’s dedication, the list of subscribers, his table of terms, the errata and the bookseller’s advertisement are not reproduced. Nor are the 212 engraved plates, their inscriptions, or the keys to the letters on them that Ware prints in the text: where Palladio writes “as in the design” the figure is in the printed book.