The Molly Brown House Museum (also known as House of Lions) is a house in Denver, Colorado, United States that was the home of American philanthropist, activist, and socialite Margaret Brown. She survived the sinking of the RMS Titanic and was known as the “Heroine of the Titanic” for her service to survivors. She later became known as "The Unsinkable Molly Brown". The museum is her former home and presents exhibits interpreting her life, Victorian Denver and historic preservation. The house was listed on the National Register of Historic Places in 1972. It is designated as a Denver Landmark.