Illustrated Architecture Dictionary

Roundel
(Pronounced roundle)

  


Small circular decorative circular panel, window, or niche, often serving as a decorative medallion on a building

Used extensively in Renaissance courtyards and arcades

A glass roundel  is a round, flat circle of glass. The glass can be colored or clear. The size of a glass roundel varies: Traditionally they were limited by how large the glass could be spun by hand. Typically, roundels are rarely larger than a foot in diameter, but ones that are handmade by skilled craftsman in specialized studios can actually get quite big! Today they are used mostly as decorative objects and sometimes as ornamental windows. But historically, glass roundels were a very common feature of buildings.

The root of both of the words Roundel and Rondel come from an Old French word: “roont”. It means, you guessed it, Round. While these words have the same background, they have alternative meanings that are distinct from one another. For example, Roundels and Rondels are also types of poems, the structures of which are different. Also, when talking about military insignia, the term Roundel always seems used.

So, when it comes to glass, what’s the right term? We have seen both words used interchangeably to describe these round glass discs. Sometimes, even the variation Rondelle is used!  It seems to just be a matter of preference, and most people who have an interest in glass will know what you are talking about if you use either term.

- Jamaica Cottage Shop (online February 2026)


Examples in Buffalo:

Other examples:

 


Photos and their arrangement © 2026 Chuck LaChiusa
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