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Portland State University: The Borobudur Temple
This page provides a wealth of details concerning the Temple of Borobudur, including its history, architectural design, and religious and cultural symbolism.
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Sacred Sites: Borobudur Stupa
This resource has a picture of a Buddha on the upper terrace of the temple, talks about the structure of the temple, and what its name means. A good site to check out on the subject.