Here’s a simple quiz. Which moulding profile below is an Ogee?
Correct answer: It depends who you talk to. There are a number of well-respected architectural books which will tell you it’s “A”. They’re wrong, and I’ll explain why.
The word Ogee is derived from the medieval French term “Ogyve” (Oh-zheeve), which described a pointed arch as pictured below. The word was Anglicized to “Ogee” and in the late 19th century was shortened to “O.G.”
Cut the arch in half and you have a Cyma Reversa, beginning and terminating vertically.
So why the confusion? Well, there wasn’t any in the 18th century. In fact builders and manufacturers of moulding planes were consistent about what constituted an Ogee right into the 20th century. It wasn’t until the late-Victorian academics got involved that things got convoluted, and I think I know why.
Before the industrial age, wood mouldings were made, or ‘stuck’ by hand with moulding planes. The profiles were cut on their side, like those pictured below. To describe a profile, you need to stand the profile up and read the profiles in descending order. But the people that made mouldings were used to seeing the profiles on their sides, so an ogee, or cyma reversa terminates horizontally when viewed as such.
Then there’s the terminology. Basically, if a Reverse Cyma is an Ogee, then a Cyma Recta is a Reverse Ogee. At some point I’m sure someone decided, “Gee, that can’t be right. A Reverse Cyma must also be a Reverse Ogee.” Makes sense.
Unfortunately as a wise man once said, “The easiest answers are also usually wrong.” Which in this case is true.