This document summarizes an Open GLAM workshop held at the Creative Commons Global Summit on September 15, 2011. The workshop discussed creating a global network to open up content and data from galleries, libraries, archives, and museums. Key topics included developing principles for open content and data, identifying incentives and barriers, and brainstorming next steps like creating an Open GLAM mailing list and wiki. The overall goal is to enable cultural heritage institutions to share digital public domain works and metadata.