Granite, a common medium in the repertoire of Sillan sculptors are seen throughout the Unified Silla period. At least one attempt at the kind of grotto art popular in India and China can be found in Gunwi that precedes the Seokguram Grotto. However, it is the central Buddha of the Seokguram Grotto that is considered by many scholars to be the epitome of Korean sculpture. Situated in the center of a complex, artificial cave, the Buddha is surrounded by artful depictions of the Buddhist pantheon. According to the "Samguk yusa" construction began in the middle of the 8th century and the sculpture of the grotto, based on this source, can be tentatively dated to that time. The style of central Buddha, including the covering of one shoulder and the fan of folds between the two crossed legs, would be followed by sculptors for the rest of the Unified Silla period and even by artisans of the early Koryo dynasty.