 It's now an artifact. The house where Marilyn Monroe probably kept her diamonds in the wealthy Los Angeles neighborhood known as Brentwood has been declared a historic cultural monument, stopping the family that bought the Spanish colonial-style home from tearing it down. The L.A. City Council made the designation Wednesday, protecting the house. Councilwoman Tracy Park saying to lose the only home Monroe ever owned would be a devastating blow for historic preservation. Monroe purchased the property in 1962 and then died there just six months later.