Calculation of the Ecclesiastical Calendar
A form that will calculate an Ecclesiastical calendar for any year; includes movable and fixed Western Christian Feasts, as well as the movable Orthodox Feasts; includes links to algorithms.
Comprehensive article about this early Christian heresy, with bibliography and links to related topics.
Early Church Documents
Writings from the Apostolic Fathers between 96-150AD. Text only and includes epistles by Clement and Ignatius.
Early Church Fathers
38 volume collection of writings from the first 800 years of the Church. Text and pdf formats.