<![CDATA[Mathematics and culture are closely interconnected, as cultural artifacts often embody mathematical ideas through their forms, structures, and patterns. Ethnomathematics provides a framework for examining this relationship by revealing mathematical concepts embedded in cultural heritage. This study aims to identify and analyze the mathematical concepts found in the architecture of Penataran Temple, Blitar, Indonesia. The research employed a qualitative design with an ethnographic approach. Data were collected through observation and documentation of the temple's architectural elements and were analyzed using visual and structural interpretation. The findings reveal various mathematical concepts, including two-dimensional and three-dimensional geometry, symmetry, geometric transformations, slope, proportional relationships, and repetitive patterns represented in the temple architecture. These findings indicate that cultural heritage embodies structured mathematical knowledge and demonstrate the relevance of ethnomathematics in uncovering mathematical ideas within local cultural contexts. This study contributes to the development of ethnomathematics by highlighting architectural heritage as a meaningful source of mathematical insight and contextual learning.]]>
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