This document compares different taxonomies for organizing large collections of documents. It evaluates taxonomies that were either manually created (LCSH, WordNet domains, Wikipedia taxonomy, DBpedia ontology) or automatically derived from document data using LDA topic modeling or Wikipedia link frequencies. The document describes applying these taxonomies to a collection of over 550,000 items from Europeana, a digital library. It then evaluates the taxonomies based on how cohesive the groupings are and how accurately the relationships between parent and child nodes are classified.