The interpretation timeline
The Sentences of Peter Lombard
The textbook every medieval theologian commented on; it fixed the number of the sacraments at seven.
c. 1150
Paris
Scholastic
c. 1100 – 15001150
Event
The Sentences of Peter Lombard
In his Sentences, Peter Lombard enumerated the seven sacraments — Baptism, Confirmation, the Eucharist, Penance, Extreme Unction, Orders, and Matrimony — the reckoning the medieval West received and the Council of Trent later defined.
Modern · 1953 →
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.