These links to a variety of study centers and academic associations contain many additional links and resources and are the source for some of what this guide contains.
Augustinian Institute (Villanova University)
http://www1.villanova.edu/villanova/mission/augustinianinstitute.html
Center for the Study of Early Christianity (Catholic University of America)
https://arts-sciences.catholic.edu/academics/interdisciplinary/early-christianity/index.html
Centre for Early Christian Studies (Australian Catholic University)
International Association of Patristic Studies
North American Patristics Society (Resources page)
http://www.patristics.org/news-item/resources/
Pappas Patristic Institute (Research Center at Holy Cross Greek Orthodox School of Theology)
http://www.hchc.edu/patristics/
Robert C. Cooley Center for the Study of Early Christianity (Gordon-Conwell Theological Seminary)
http://www.gordonconwell.edu/resources/cooley-center.cfm
Southwestern Center for Early Christian Studies
https://earlychristianstudies.org/
The Wheaton Center for Early Christian Studies https://www.wheaton.edu/academics/school-of-biblical-and-theological-studies/the-wheaton-center-for-early-christian-studies/
