I never heard of him, give me a brief description.
Is he a modern writer? what denomination does he fall under? what type of writing etc? thanks
Mostly his field of study regards church history and is arguably a standard of authority (but not 'the' standard).
The works cited are from Wiki:
Schaff, Philip. History of the Christian Church in 8 volumes.
Schaff, Philip. 'A Library of Religious Poetry. A collection of The Best Religious Poems of all Ages and Tongues'. London etc. 1881.
Schaff, Philip. Creeds of Christendom, with a History and Critical notes, volume I, volume II and volume III
Schaff, Philip. The Creeds of the Evangelical Protestant Churches
The New Schaff-Herzog Encyclopedia of Religious Knowledge. Schaff edited the European Herzog encyclopedia for an American audience. This is a revision of that work.
Ante-Nicene Fathers and two series of Nicene and Post-Nicene Fathers in 38 volumes total. Edited by Schaff et al.
Philip Schaff's Letter book, private correspondence from June 2, 1868 to August 26, 1881.
A collection of quotations related to: Philip Schaff on Luther's Bible