Over the years, Indiana University Digital Library Program has created dozens of digital collections for research and preservation. Traditionally, each collection will have its own website for public access. However, as new collections are being added to the repository on a regular basis and as the content becomes more diversified, there is a growing demand for a discovery interface that allows access to all the digital collections maintained by the Digital Library Program. The IU Digital Collections Search has been developed to meet this demand, and serves as the 'one-stop' user interface to all publicly available digitized items. Its index includes more than 65,000 items such as photo, sheetmusic, speech, letter, and papers from the following sources: IU Archives Lilly Library Indiana State Library Indiana State Museum Indiana Historical Society Indiana Magazine of History Archives of Traditional Music Working Men's Institute Calumet Regional Archives at Indiana University Northwest Our presentation will focus on the DLP's work to develop this cross collection discovery interface for digitized items stored in the Fedora repository. William Cowan will discuss the motivation, main features, and future plans of the project. Hui Zhang will talk about the practice on building a Solr index for MODS records and a faceted search interface with Blacklight. The talk will also include a demo of the newly developed search interface.