The library's catalog is a great place to begin your research. Simply use a variety of keywords, or click on "Advanced Search" to be more specific.
The library has access to a variety of print and electronic encyclopedias, dictionaries, and monographs focusing on Catholic Church history.
New Catholic Encyclopedia by 
New Catholic Encyclopedia Supplement
The Encyclopedia of American Catholic History by 
The Cambridge Dictionary of Christian Theology by 
The Roman Catholics in America by 
The Oxford Dictionary of the Christian Church by Consider using ATLA to begin searching for scholarly journals. Other resources are considered multidisciplinary but contain a wealth of good information. If you would like an article or book the library does not have access to, please consider using interlibrary loan.
The library has access to numerous scholarly journals about the Catholic Church, both in print and online. Here are some specific titles that focus on church history. Please note that some of this content is historic and doesn't stretch to the present date. If you would like an article or book the library does not have access to, please consider using interlibrary loan.