This document summarizes key principles of property law, specifically regarding the lex situs rule and its exceptions. The lex situs rule dictates that the law of the place where property is situated governs issues of ownership and interests in that property. For immovables, this includes capacity to own, formalities of transfer, validity of transfers and mortgages. Exceptions are succession matters, which are governed by the nationality of the deceased, and contractual rights/obligations, governed by the proper law of the contract.