Temple Groups B, C, and D

Groups B, C, and D form the central cluster of My Son — the most intact section of the site and the most visited. Group B contains several substantial kalan (sanctuary towers) and the building known as B5, a remarkable "storehouse" or kosagrha with a distinctive saddle-shaped roof that has no close parallel in Southeast Asian religious architecture. The brick carvings on the exterior walls include mythological figures, floral patterns, and scenes from Hindu scripture.

Group C sits adjacent and is in a similar style, with a well-preserved kalan and surrounding subsidiary structures. Group D has two mandapas (entry halls) that have been partially roofed by conservators to protect the interior — these contain an in-situ display of Cham sculpture fragments and replica pieces, with the originals now in the Museum of Cham Sculpture in Da Nang. Together these three groups give the best sense of Cham temple architecture at its peak: red brick towers with intricate carved decoration, built without mortar, surviving from the 9th to 12th centuries.

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A story
The "storehouse" B5 has a saddle-shaped roof unlike any other building in Southeast Asian religious architecture — a form that appears to have developed independently at Champa with no clear precedent elsewhere. French scholars in the early 20th century spent years debating whether the brick walls were fired before or after assembly and what adhesive was used; tests still cannot determine definitively how Cham builders joined bricks with such precision and what appears to be no visible mortar layer.