AM bya la TORE ee
1 - A passageway around the apse of a church
2- A covered walk of a cloister
The first example of an ambualtory with chapels comes from St.-Denis Abbey, just outside of Paris, France. Suger's conception of the ambulatory with its "radiating" chapels was partnered with filtered light through stained-glass windows, On the side of the ambulatory facing the outer wall, there are chapels that extend the outer wall.
Ambulatories (definition #1) are somewhat rare in America, but common in Europe.
- Illustration above: St. Denis Abbey, Paris, France (Definition #1)