In early 2015, they announced their intention to destroy many ancient artifacts, which they deemed idolatrous or otherwise un-Islamic; they subsequently destroyed thousands of books and manuscripts in Mosul's libraries.
Pada awal 2015, mereka mengumumkan niat mereka untuk menghancurkan banyak artefak kuno, karena bagi mereka patung berhala atau sebaliknya tidak Islami, serta menghancurkan ribuan buku dan manuskrip di perpustakaan Mosul ini.