Civil Code, Art. 16

Real property as well as personal property is subject to the law of the country where it is situated. However, intestate and testamentary successions, both with respect to the order of succession and to the amount of successional rights and to the intrinsic validity of testamentary provisions, shall be regulated by the national law of the person whose succession is under consideration, whatever may be the nature of the property and regardless of the country wherein said property may be found. (10a)