The William S. Hart Mansion is a historic house located in Newhall, California. Built in 1923, it was the home of silent film star William S. Hart, who was known for his roles in Westerns. The mansion features a blend of Spanish Colonial and Mission Revival architectural styles, showcasing beautiful craftsmanship and unique design elements. Today, the mansion is part of the William S. Hart Park, which includes gardens and hiking trails. The house is open to the public for tours, allowing visitors to explore its rich history and learn about Hart's contributions to early cinema and the Western genre.