The Korea Heritage Service has designated the Daegwangjeon Hall of Sinansa Temple in Geumsan County, South Chungcheong Province, as a Treasure, one of the country's state heritage designations just below National Treasure. No written record establishes exactly when the hall, the temple's main worship building, was first built. But a ridge-beam inscription discovered during dismantling repairs in 2007 recorded a 1638 reconstruction and an 1840 renovation. Later, in 2023, tree-ring dating of key wooden members found several dated to 1583, scientifically confirming the hall was originally built in the 16th century. The hall features a "dapo" bracket style — in which bracket sets supporting the roof's weight are placed both atop the columns and between them, rather than only atop the columns — combined with a gable roof, a design in which the roof slopes only at the front and back. The agency said placing bracket sets on the building's sides and corners despite its gable-roof design is a distinctive feature reflecting 16th-century construction techniques. Other elements considered signs