Rosslyn Chapel, featured in Dan Brown's "The Da Vinci Code," is a 15th-century Scottish Episcopal Church chapel located in Roslin, Scotland. The chapel's intricate carvings and mysterious legends have sparked speculation about connections to the Knights Templar and the Holy Grail. Despite its portrayal in popular culture, historians dismiss these theories as unfounded. The chapel remains privately owned and continues to intrigue visitors with its unique architecture and enigmatic history.