Fig. d.—Lancet Arch.
The Lancet Arch was characteristic of the Early English period, is never found earlier, and but rarely occurs later. The Equilateral Arch was the favourite arch of the architects of the geometrical Decorated, but is not unfrequently met with in the early part of the Perpendicular period.
Fig. e.—Ogival Arch.
Fig. f.—Depressed Tudor Arch.
The Depressed (or Four-centred) Tudor Arch is characteristic of the Perpendicular period, and was then constantly employed. The Ogival Arch is occasionally employed late in that period, but was more used by French and Italian architects than by those of Great Britain.