moulding 2,
translated into stone, forms the universal archivolt of the early
pointed arches of Venice, and windows of second and third orders. The
moulding 1 is much rarer, and used for the most part in doors only.

The reader will see at once the resemblance of character in the various
flat brick mouldings, 3 to 11. They belong to such arches as 1 and 2 in
Plate XVII. Vol. II.; or 6 _b_, 6 _c_, in Plate XIV. Vol. II., 7 and 8
being actually the mouldings of those two doors; the whole group being
perfectly defined, and separate from all the other Gothic work in
Venice, and clearly the result of an effort to imitate, in brickwork,
the effect of the flat sculptured archivolts of the Byzantine times.
(See Vol. II. Chap. VII. Sec. XXXVII.)

Then comes the group 14 to 18 in stone, derived from the mouldings 1 and
2; first by truncation, 14; then by beading the truncated angle, 15, 16.
The occurrence of the profile 16 in the three beautiful windows
represented in the uppermost figure of Plate XVIII. Vol. I. renders that
group of peculiar interest, and is strong evidence of its antiquity.
Then a cavetto is added, 17; first shallow and then deeper, 18, which is
the common archivolt moulding of the central Gothic door and window:
but, in the windows of the early fourth order, this moulding is
complicated by various additions of dog-tooth mouldings under the
dentil, as in 20; or the _gabled_ dentil (see fig. 20, Plate IX. Vol.
I), as fig. 21; or both, as figs 23, 24. All these varieties expire in
the advanced period, and the established moulding for windows is 29. The
intermediate group, 25 to 28, I found only in the high windows of the
third order in the Ducal Palace, or in the Chapter-house of the Frari,
or in the arcades of the Ducal Palace; the great outside lower arcade of
the Ducal Palace has the profile 31, the left-hand side being the
innermost.

Now observe, all these archivolts, without exception, assume that the
spectator looks from the outside only: none are complete on both sides;
they are essentially _window_ mouldings, and have no resemblance to
those of our perfect Gothic arches prepared for traceries. If they were
all completely drawn in the plate, they should be as fig. 25, having a
great depth of wall behind the mouldings, but it was useless to
represent this in every case. The Ducal Palace begins to show mouldings
on both sides, 28, 31; and 35 is a _complete_ arch moulding from the
apse of the Frari. That