SO WHAT IS a quoin anyway … other than a great word to have in your head when playing Scrabble®? Or how about a rincleau? A belvedere? A radiating voussoir? If these questions leave you scratching your head in wonder and confusion, you’re not alone! Few people outside the confines of an architect’s office have a working knowledge of architectural terminology. For you, however, that’s about to change! After studying the following glossary, you’ll be able to amaze your friends as you walk through the streets of your town pointing out lancets, porticos, corbels and campaniles.