Mrs. Sam Houston House is a historic house on FM 390, one block east of the junction with FM 50 in Independence, Texas.Sometimes known as the Root house, this Greek Revival house was built in 1832. Margaret Lea Houston, the widow of politician and Texas statesman Sam Houston, bought the house in 1864 Major Eber Cave, a family friend. She lived in it during her final years until her death in 1867. The property was listed on the National Register of Historic Places in 1970 as the "Mrs.