Just a humble 3.5 ft triangular space (built it myself) that doubles up as a computer and artmaking space. Your invitation to share got me thinking why my “sacred space” works for me and about the significance of the shape. Here’s one interpretation I found:

triangle symbol meaning: creation/creativity. Each side and corner sings out a melody, and their combination in form creates a marvelous harmonic orchestration.

WOW: it all makes sense now! PS: don’t know if the picture will upload.