Marine archaeologists and heritage researchers in Central Java have identified the remains of a 9th-century maritime shrine belonging to the Sailendra dynasty. The site is unique for its use of volcanic basalt combined with rare sea-shell lime mortar. The most significant find includes a set of intact bronze finials (stupikas) that once adorned the temple's roof, which have survived in remarkable condition despite the region's humid climate.
The temple's orientation suggests it was used as a navigational landmark for sailors traveling between the Javanese coast and mainland Southeast Asia. Inscriptions found on the surrounding stone platforms detail offerings made by merchant guilds, confirming the temple's role as a spiritual hub for ancient maritime trade networks.