This document summarizes luxury libraries from around the world. It describes the ornate Baroque library at Melk Abbey in Austria, with its impressive manuscript collection. It also details the enormous palace-monastery of Mafra in Portugal, including the highlight of its 88-meter long library. Finally, it provides brief overviews of the largest monastic library in the world at Admont Abbey in Austria, the National Széchényi Library in Budapest, and several other notable libraries from Portugal, Austria, Spain, the Czech Republic, and England.