The latest ‘issue’ of LLRX includes a guide by Louise Tsang on English-language resources on the legal protection of cultural property:

bq. The purpose of this guide is to direct the reader to important sources of information, both print and electronic, concerning the protection of cultural property in wartime, international trade in cultural property, and the laws applicable to the illicit traffic of art and antiquities. Section V of this guide highlights resources that are specific to the topic of restitution of Nazi-looted art. Section VI highlights resources on stolen cultural property in Iraq. This guide focuses on materials in English.

There are links and a bibliography, and international and EU law as well as the situation in individual countries are considered.