This document discusses the CIDOC CRM and FRBROO conceptual models for integrating museum and library information. It describes how CIDOC CRM was developed for museums and FRBR for libraries, and how the FRBR/CIDOC CRM Harmonisation Group merged the two models into FRBROO to allow for interoperability between museum and library databases. FRBROO extends CIDOC CRM to represent both unique museum objects and non-unique library publications, as well as authority files. An example is provided to illustrate how FRBROO can model a stage performance. Potential uses of FRBROO are mentioned, along with some organizations experimenting with it.